feat(android): consolidate databases and add prefetch scheduling
Consolidate Java and Kotlin database implementations into unified schema, add delayed prefetch scheduling, and fix notification delivery issues. Database Consolidation: - Merge Java DailyNotificationDatabase into Kotlin DatabaseSchema - Add migration path from v1 to v2 unified schema - Include all entities: ContentCache, Schedule, Callback, History, NotificationContentEntity, NotificationDeliveryEntity, NotificationConfigEntity - Add @JvmStatic getInstance() for Java interoperability - Update DailyNotificationWorker and DailyNotificationStorageRoom to use unified database Prefetch Functionality: - Add scheduleDelayedFetch() to FetchWorker for 5-minute prefetch before notifications - Support delayed WorkManager scheduling with initialDelay - Update scheduleDailyNotification() to optionally schedule prefetch when URL is provided Notification Delivery Fixes: - Register NotifyReceiver in AndroidManifest.xml (was missing, causing notifications not to fire) - Add safe database initialization with lazy getDatabase() helper - Prevent PluginLoadException on database init failure Build Configuration: - Add kotlin-android and kotlin-kapt plugins - Configure Room annotation processor (kapt) for Kotlin - Add Room KTX dependency for coroutines support - Fix Gradle settings with pluginManagement blocks Plugin Methods Added: - checkPermissionStatus() - detailed permission status - requestNotificationPermissions() - request POST_NOTIFICATIONS - scheduleDailyNotification() - schedule with AlarmManager - configureNativeFetcher() - configure native content fetcher - Various status and configuration methods Code Cleanup: - Remove duplicate BootReceiver.java (keep Kotlin version) - Remove duplicate DailyNotificationPlugin.java (keep Kotlin version) - Remove old Java database implementation - Add native fetcher SPI registry (@JvmStatic methods) The unified database ensures schedule persistence across reboots and provides a single source of truth for all plugin data. Prefetch scheduling enables content caching before notifications fire, improving offline-first reliability.
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