docs: Apply markdown_core.mdc standards to RESEARCH_COMPLETE.md

- Fix line length to never exceed 80 characters
- Add proper blank lines around all structural elements
- Fix code block language specification (ASCII diagram)
- Ensure consistent formatting and educational focus
- Pass markdownlint validation (0 errors)

Resolves: Markdown formatting standards compliance

doc/RESEARCH_COMPLETE.md

@@ -11,37 +11,58 @@
 ## 🎯 **EXECUTIVE SUMMARY**
 
 ### **Research Objective**
-Analyze user feedback regarding the Daily Notification Plugin's need for enhanced callback mechanisms and dual scheduling methods to support external service integration.
+
+Analyze user feedback regarding the Daily Notification Plugin's need for
+enhanced callback mechanisms and dual scheduling methods to support external
+service integration.
 
 ### **Key Findings**
-1. **Callback System Required**: Plugin needs to accept callbacks for API calls, database operations, and reporting services
-2. **Dual Scheduling Architecture**: Need separate methods for content fetching vs. user notification
-3. **External Service Integration**: Support for reporting services and database operations
+
+1. **Callback System Required**: Plugin needs to accept callbacks for API
+   calls, database operations, and reporting services
+2. **Dual Scheduling Architecture**: Need separate methods for content
+   fetching vs. user notification
+3. **External Service Integration**: Support for reporting services and
+   database operations
 4. **Backward Compatibility**: Must maintain existing API functionality
 
-### **Implementation Complexity**: 🔴 **HIGH** - Requires significant architecture changes
+### **Implementation Complexity**: 🔴 **HIGH**
+
+Requires significant architecture changes
 
 ---
 
 ## 📋 **USER REQUIREMENTS ANALYSIS**
 
 ### **User Feedback Summary**
-> "BTW, I still think it's worth starting a branch where we use the notification plugin, but a note on the plugin itself: seems like it'll need a couple things. One is to accept some callbacks (eg. for API calls out to a reporting service and then saving in the DB). The other is that I believe we need two 'schedule' methods, one that does the call-API-store-in-DB function and the other that does the retrieve-from-DB-and-notify-user function."
+
+> "BTW, I still think it's worth starting a branch where we use the
+> notification plugin, but a note on the plugin itself: seems like it'll
+> need a couple things. One is to accept some callbacks (eg. for API
+> calls out to a reporting service and then saving in the DB). The other
+> is that I believe we need two 'schedule' methods, one that does the
+> call-API-store-in-DB function and the other that does the
+> retrieve-from-DB-and-notify-user function."
 
 ### **Core Requirements Identified**
 
 #### **1. Callback System Integration**
+
 - **API Callbacks**: Handle external API responses and errors
 - **Database Callbacks**: Support storage and retrieval operations
 - **Reporting Callbacks**: Integrate with analytics and reporting services
 - **Error Handling**: Comprehensive callback failure management
 
 #### **2. Dual Scheduling Methods**
+
 - **Method 1**: `scheduleContentFetch()` - API calls and database storage
-- **Method 2**: `scheduleUserNotification()` - Database retrieval and user notification
-- **Separation of Concerns**: Clear distinction between data operations and user interaction
+- **Method 2**: `scheduleUserNotification()` - Database retrieval and user
+  notification
+- **Separation of Concerns**: Clear distinction between data operations
+  and user interaction
 
 #### **3. External Service Integration**
+
 - **Reporting Services**: Analytics and metrics collection
 - **Database Operations**: External database storage and retrieval
 - **API Integration**: Enhanced HTTP client with callback support
@@ -52,12 +73,14 @@ Analyze user feedback regarding the Daily Notification Plugin's need for enhance
 ## 🔍 **CURRENT IMPLEMENTATION GAP ANALYSIS**
 
 ### **What Exists Today**
+
 - ✅ **Basic scheduling**: Single `scheduleDailyNotification` method
 - ✅ **URL fetching**: Basic HTTP request support
 - ✅ **Platform support**: Android, iOS, and Web implementations
 - ✅ **Interface definitions**: Well-structured TypeScript interfaces
 
 ### **What's Missing**
+
 - ❌ **Callback mechanism**: No way to handle external service responses
 - ❌ **Dual scheduling**: Single method handles everything
 - ❌ **API integration**: Limited to basic URL fetching
@@ -65,8 +88,10 @@ Analyze user feedback regarding the Daily Notification Plugin's need for enhance
 - ❌ **Reporting integration**: No analytics or metrics callbacks
 
 ### **Gap Impact Assessment**
+
 - **User Experience**: Limited to basic notifications without external data
-- **Integration Capability**: Cannot integrate with reporting or database services
+- **Integration Capability**: Cannot integrate with reporting or database
+  services
 - **Flexibility**: Rigid scheduling without custom logic support
 - **Scalability**: No way to handle complex notification workflows
 
@@ -76,7 +101,7 @@ Analyze user feedback regarding the Daily Notification Plugin's need for enhance
 
 ### **High-Level Design**
 
-```
+```ascii
 ┌─────────────────────────────────────────────────────────────┐
 │                    Daily Notification Plugin                │
 ├─────────────────────────────────────────────────────────────┤
@@ -102,6 +127,7 @@ Analyze user feedback regarding the Daily Notification Plugin's need for enhance
 ### **Callback System Architecture**
 
 #### **Callback Types**
+
 ```typescript
 interface CallbackSystem {
   // API callbacks for external service integration
@@ -129,18 +155,22 @@ interface CallbackSystem {
 #### **Dual Scheduling Methods**
 
 **Content Fetch Method**:
+
 ```typescript
 async scheduleContentFetch(options: ContentFetchOptions): Promise<void>
 ```
+
 - Makes API calls to external services
 - Executes database storage callbacks
 - Handles retry logic and fallbacks
 - Reports to analytics/reporting services
 
 **User Notification Method**:
+
 ```typescript
 async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ```
+
 - Retrieves content from database/cache
 - Executes user notification callbacks
 - Handles notification display logic
@@ -151,18 +181,21 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 📊 **IMPLEMENTATION COMPLEXITY ASSESSMENT**
 
 ### **Technical Complexity**: 🔴 **HIGH**
+
 - **Architecture Changes**: Significant interface redesign required
 - **Platform Integration**: Need to implement across Android/iOS/Web
 - **Callback Management**: Complex lifecycle and error handling
 - **Backward Compatibility**: Must maintain existing API functionality
 
 ### **Business Complexity**: 🟡 **MEDIUM**
+
 - **User Impact**: Existing users need migration path
 - **Testing Requirements**: Comprehensive callback testing needed
 - **Documentation**: Significant API documentation updates required
 - **Training**: Team needs to understand new callback patterns
 
 ### **Risk Factors**: 🔴 **HIGH**
+
 - **Interface Changes**: Breaking changes to existing API
 - **Performance Impact**: Callback overhead on notification delivery
 - **Platform Differences**: Ensuring consistent behavior across platforms
@@ -175,37 +208,44 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ### **Overall Project Timeline**: 2-3 weeks
 
 #### **Week 1: Foundation & Design**
+
 - **Days 1-2**: Interface design and callback system architecture
 - **Day 3**: Implementation planning and task breakdown
 
 #### **Week 2: Core Implementation**
+
 - **Days 4-5**: Core callback system implementation
 - **Days 6-7**: Dual scheduling methods implementation
 
 #### **Week 3: Integration & Testing**
+
 - **Days 8-9**: Platform integration (Android, iOS, Web)
 - **Day 10**: Testing, documentation, and final review
 
 ### **Detailed Effort Breakdown**
 
 #### **Phase 1: Interface Updates (Days 1-2)**
+
 - **Callback interface design**: 4-6 hours
 - **Dual scheduling interfaces**: 4-6 hours
 - **Total**: 8-12 hours
 
 #### **Phase 2: Core Implementation (Days 2-4)**
+
 - **Callback registry system**: 6-8 hours
 - **Dual scheduling methods**: 8-10 hours
 - **Backward compatibility**: 4-6 hours
 - **Total**: 18-24 hours
 
 #### **Phase 3: Platform Integration (Days 4-5)**
+
 - **Android implementation**: 6-8 hours
 - **iOS implementation**: 6-8 hours
 - **Web implementation**: 4-6 hours
 - **Total**: 16-22 hours
 
 #### **Phase 4: Testing & Documentation (Day 5)**
+
 - **Comprehensive testing**: 8-10 hours
 - **Documentation updates**: 4-6 hours
 - **Total**: 12-16 hours
@@ -219,18 +259,23 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ### **Recommended Approach**
 
 #### **1. Phased Implementation**
+
 - **Phase 1**: Interface design and core architecture
 - **Phase 2**: Core callback system implementation
 - **Phase 3**: Platform-specific integration
 - **Phase 4**: Testing and documentation
 
 #### **2. Risk Mitigation**
-- **Backward Compatibility**: Maintain existing API with deprecation warnings
+
+- **Backward Compatibility**: Maintain existing API with deprecation
+  warnings
 - **Incremental Testing**: Test each phase thoroughly before proceeding
-- **Performance Monitoring**: Monitor callback overhead throughout implementation
+- **Performance Monitoring**: Monitor callback overhead throughout
+  implementation
 - **Rollback Plan**: Maintain ability to revert changes if needed
 
 #### **3. Quality Assurance**
+
 - **Comprehensive Testing**: Unit, integration, and performance testing
 - **Code Review**: All changes reviewed by team
 - **Documentation**: Complete API documentation updates
@@ -241,6 +286,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 🔒 **SECURITY & PERFORMANCE CONSIDERATIONS**
 
 ### **Security Requirements**
+
 - **Callback Validation**: Validate all callback parameters
 - **Sandboxing**: Execute callbacks in controlled environment
 - **Rate Limiting**: Prevent callback abuse
@@ -248,12 +294,14 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 - **Data Encryption**: Encrypt sensitive data in callbacks
 
 ### **Performance Requirements**
+
 - **Callback Overhead**: Minimize impact on notification delivery
 - **Memory Usage**: Efficient callback registry storage
 - **Battery Impact**: Minimal battery usage on mobile devices
 - **Network Impact**: Optimize external service calls
 
 ### **Optimization Strategies**
+
 - **Callback Batching**: Execute multiple callbacks together
 - **Async Execution**: Non-blocking callback execution
 - **Caching**: Cache callback results where appropriate
@@ -264,12 +312,15 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 🧪 **TESTING REQUIREMENTS**
 
 ### **Testing Strategy**
+
 - **Unit Testing**: Callback registration, execution, and error handling
-- **Integration Testing**: API integration, database operations, cross-platform
+- **Integration Testing**: API integration, database operations,
+  cross-platform
 - **Performance Testing**: Callback latency, memory usage, battery impact
 - **Security Testing**: Callback validation, authentication, data protection
 
 ### **Test Coverage Goals**
+
 - **New Functionality**: 95%+ test coverage
 - **Existing Functionality**: Maintain 100% test coverage
 - **Cross-Platform**: Consistent behavior across all platforms
@@ -280,6 +331,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 📚 **DELIVERABLES**
 
 ### **Code Deliverables**
+
 - [ ] Enhanced plugin with callback system
 - [ ] Dual scheduling methods implementation
 - [ ] Platform-specific integrations (Android, iOS, Web)
@@ -287,6 +339,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 - [ ] Comprehensive test suite
 
 ### **Documentation Deliverables**
+
 - [ ] Updated API documentation
 - [ ] Callback usage examples
 - [ ] Dual scheduling examples
@@ -294,6 +347,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 - [ ] Performance and security guidelines
 
 ### **Quality Deliverables**
+
 - [ ] 95%+ test coverage for new functionality
 - [ ] Performance benchmarks
 - [ ] Security audit report
@@ -304,6 +358,7 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 🎯 **SUCCESS CRITERIA**
 
 ### **Functional Success**
+
 - [ ] **Callback System**: 100% callback execution success rate
 - [ ] **Dual Scheduling**: Both methods working independently
 - [ ] **API Integration**: Successful external service integration
@@ -311,12 +366,14 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 - [ ] **Backward Compatibility**: Existing code continues to work
 
 ### **Quality Success**
+
 - [ ] **Test Coverage**: 95%+ coverage for new functionality
 - [ ] **Performance**: No degradation in existing functionality
 - [ ] **Security**: Secure callback execution and validation
 - [ ] **Documentation**: Complete API documentation updates
 
 ### **Platform Success**
+
 - [ ] **Android**: Full callback support with WorkManager
 - [ ] **iOS**: Full callback support with BGTaskScheduler
 - [ ] **Web**: Full callback support with Service Workers
@@ -329,26 +386,32 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ### **High-Risk Areas**
 
 #### **1. Interface Changes**
+
 - **Risk**: Breaking changes to existing API
-- **Mitigation**: Maintain backward compatibility with deprecation warnings
+- **Mitigation**: Maintain backward compatibility with deprecation
+  warnings
 - **Impact**: Medium - affects existing users
 
 #### **2. Performance Impact**
+
 - **Risk**: Callback overhead on notification delivery
 - **Mitigation**: Implement callback batching and optimization
 - **Impact**: High - affects user experience
 
 #### **3. Platform Differences**
+
 - **Risk**: Ensuring consistent behavior across platforms
 - **Mitigation**: Create platform-agnostic callback interfaces
 - **Impact**: High - affects cross-platform compatibility
 
 #### **4. Error Handling**
+
 - **Risk**: Complex callback failure scenarios
 - **Mitigation**: Comprehensive error handling with fallbacks
 - **Impact**: High - affects system reliability
 
 ### **Risk Mitigation Strategies**
+
 - **Phased Implementation**: Implement in small, testable units
 - **Comprehensive Testing**: Test all scenarios thoroughly
 - **Performance Monitoring**: Monitor impact throughout implementation
@@ -359,18 +422,22 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 📅 **NEXT STEPS**
 
 ### **Immediate Actions (Next 1-2 days)**
+
 1. **Stakeholder Review**: Review research findings with team
-2. **Implementation Approval**: Get approval to proceed with implementation
+2. **Implementation Approval**: Get approval to proceed with
+   implementation
 3. **Resource Allocation**: Assign developers to implementation tasks
 4. **Timeline Confirmation**: Confirm implementation timeline
 
 ### **Short-Term Actions (Next 1 week)**
+
 1. **Create Implementation Branch**: Set up feature branch for development
 2. **Begin Interface Design**: Start designing callback interfaces
 3. **Create Implementation Plan**: Break down implementation into tasks
 4. **Set Up Testing Framework**: Prepare testing infrastructure
 
 ### **Medium-Term Actions (Next 2-3 weeks)**
+
 1. **Core Implementation**: Implement callback system and dual scheduling
 2. **Platform Integration**: Integrate with Android, iOS, and Web
 3. **Testing & Validation**: Comprehensive testing of all functionality
@@ -381,18 +448,31 @@ async scheduleUserNotification(options: UserNotificationOptions): Promise<void>
 ## 📊 **CONCLUSION**
 
 ### **Research Summary**
-The Daily Notification Plugin requires significant enhancements to support callback-based external service integration and dual scheduling methods. The current single-method approach is insufficient for complex notification workflows that require API calls, database operations, and reporting service integration.
+
+The Daily Notification Plugin requires significant enhancements to support
+callback-based external service integration and dual scheduling methods.
+The current single-method approach is insufficient for complex notification
+workflows that require API calls, database operations, and reporting
+service integration.
 
 ### **Key Recommendations**
-1. **Proceed with Implementation**: The requirements are well-defined and technically feasible
+
+1. **Proceed with Implementation**: The requirements are well-defined and
+   technically feasible
 2. **Phased Approach**: Implement in phases to manage risk and complexity
-3. **Backward Compatibility**: Maintain existing API functionality during transition
-4. **Comprehensive Testing**: Thorough testing required for all new functionality
-5. **Performance Monitoring**: Monitor callback overhead throughout implementation
+3. **Backward Compatibility**: Maintain existing API functionality during
+   transition
+4. **Comprehensive Testing**: Thorough testing required for all new
+   functionality
+5. **Performance Monitoring**: Monitor callback overhead throughout
+   implementation
 
 ### **Success Probability**: 🟡 **MEDIUM-HIGH**
-- **Technical Feasibility**: High - well-understood patterns and technologies
-- **Implementation Risk**: Medium - significant architecture changes required
+
+- **Technical Feasibility**: High - well-understood patterns and
+  technologies
+- **Implementation Risk**: Medium - significant architecture changes
+  required
 - **Business Value**: High - enables complex notification workflows
 - **User Impact**: Medium - requires migration for existing users
 
@@ -405,9 +485,12 @@ The Daily Notification Plugin requires significant enhancements to support callb
 **Status**: Research complete, ready for implementation planning  
 **Next Phase**: Implementation planning and resource allocation  
 
-**Documents**: This consolidated document replaces all previous research documents  
-**Git History**: Complete research commit history available in this branch  
-**Pull Request**: Available at the remote repository for review and collaboration
+**Documents**: This consolidated document replaces all previous research
+documents  
+**Git History**: Complete research commit history available in this
+branch  
+**Pull Request**: Available at the remote repository for review and
+collaboration
 
 ---
 
@@ -422,7 +505,9 @@ The Daily Notification Plugin requires significant enhancements to support callb
 ## 📋 **APPENDIX: DOCUMENT CONSOLIDATION**
 
 ### **Consolidated Documents**
+
 This single document replaces the following separate documents:
+
 - ~~`IMPLEMENTATION_PLAN.md`~~ → Integrated into main sections
 - ~~`README_RESEARCH.md`~~ → Integrated into main sections  
 - ~~`RESEARCH_SUMMARY.md`~~ → Integrated into main sections
@@ -430,6 +515,7 @@ This single document replaces the following separate documents:
 - ~~`CALLBACK_ANALYSIS.md`~~ → Integrated into architecture sections
 
 ### **Benefits of Consolidation**
+
 - **Eliminates Duplication**: No more overlapping information
 - **Single Source of Truth**: One document for all research findings
 - **Easier Maintenance**: Updates only need to be made in one place
@@ -437,8 +523,9 @@ This single document replaces the following separate documents:
 - **Reduced Confusion**: Team members know where to find information
 
 ### **Document Structure**
+
 - **Executive Summary**: High-level overview and key findings
-- **Requirements Analysis**: Detailed user requirements and gap analysis
+- **Requirements Analysis**: User feedback and gap analysis
 - **Architecture**: Technical design and implementation approach
 - **Implementation Strategy**: Phased approach with timeline
 - **Risk Assessment**: Comprehensive risk analysis and mitigation