- Add ensureStorageInitialized() helper method for null safety
- Add storage initialization checks to all plugin methods
- Fix null pointer exception in scheduleDailyNotification()
- Add storage initialization to getLastNotification()
- Add storage initialization to cancelAllNotifications()
- Add storage initialization to updateSettings()
- Add storage initialization to setAdaptiveScheduling()
- Add storage initialization to checkAndPerformRecovery()
- Improve exact alarm permission handling with proper Settings intent
- Add comprehensive error handling for storage operations
This resolves the 'Attempt to invoke virtual method on null object'
error that was occurring when plugin methods were called before
storage initialization completed.