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/web/index.ts

@@ -19,6 +19,11 @@ export class DailyNotificationWeb implements DailyNotificationPlugin {
   };
   private scheduledNotifications: Set<string> = new Set();
 
+  async configure(_options: any): Promise<void> {
+    // Web implementation placeholder
+    console.log('Configure called on web platform');
+  }
+
   /**
    * Schedule a daily notification
    */