- Add deduplication system to prevent double-firing of notifications
* Check existing notifications within 1-minute tolerance before scheduling
* Prevents duplicate notifications from receiver double-firing on some OEMs
* Structured logging: DN|RESCHEDULE_DUPLICATE, DN|SCHEDULE_DUPLICATE
- Implement WorkManager doze fallback system for deep doze scenarios
* DozeFallbackWorker runs 30 minutes before notification time
* Re-arms exact alarms if they get pruned during deep doze mode
* Battery-friendly constraints with no network requirement
* Structured logging: DN|DOZE_FALLBACK_SCHEDULED, DN|DOZE_FALLBACK_REARM_OK
- Add JIT soft re-fetch for borderline age content
* SoftRefetchWorker prefetches fresh content when content is 80% of TTL
* Runs 2 hours before tomorrow's notification for proactive freshness
* Asynchronous background processing with network constraints
* Structured logging: DN|JIT_BORDERLINE, DN|SOFT_REFETCH_SCHEDULED
- Enhance DailyNotificationWorker with comprehensive resilience features
* Ultra-lightweight receiver with WorkManager handoff
* DST-safe scheduling with ZonedDateTime calculations
* Storage capping and retention policy (100 entries, 14-day retention)
* Performance monitoring with StrictMode and Trace markers
- Add comprehensive status checking API
* NotificationStatusChecker provides unified permission/channel status
* Channel management with deep links to settings
* Exact alarm permission validation and guidance
All P1 features tested and working under system stress conditions.
Notification system now production-ready with full resilience suite.
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