feat(android): implement Phase 1.1 SQLite database sharing with WAL mode

- Add DailyNotificationDatabase.java with three-table schema and WAL configuration
- Add DailyNotificationMigration.java for SharedPreferences to SQLite migration
- Add DailyNotificationDatabaseTest.java with comprehensive unit tests
- Add ConfigureOptions interface with dbPath, storage mode, and TTL settings
- Add configure() method to DailyNotificationPlugin interface
- Update Android plugin with SQLite integration and automatic migration
- Update web implementations to implement new configure() method
- Add phase1-sqlite-usage.ts example demonstrating shared storage configuration

This implements the critical Phase 1.1 gate for shared SQLite storage:
- App and plugin can open the same SQLite file with WAL mode
- Automatic migration from SharedPreferences preserves existing data
- Schema version checking prevents compatibility issues
- Concurrent reads during background writes enabled
- Configuration API supports both shared and tiered storage modes

Files: 8 changed, 1204 insertions(+)

src/definitions.ts

@@ -153,6 +153,15 @@ export interface SchedulingConfig {
   timezone: string;
 }
 
+export interface ConfigureOptions {
+  dbPath?: string;
+  storage?: 'shared' | 'tiered';
+  ttlSeconds?: number;
+  prefetchLeadMinutes?: number;
+  maxNotificationsPerDay?: number;
+  retentionDays?: number;
+}
+
 // Dual Scheduling System Interfaces
 export interface ContentFetchConfig {
   enabled: boolean;
@@ -248,6 +257,9 @@ export interface DualScheduleStatus {
 
 // Enhanced DailyNotificationPlugin interface with dual scheduling
 export interface DailyNotificationPlugin {
+  // Configuration methods
+  configure(options: ConfigureOptions): Promise<void>;
+  
   // Existing methods
   scheduleDailyNotification(options: NotificationOptions | ScheduleOptions): Promise<void>;
   getLastNotification(): Promise<NotificationResponse | null>;