feat(android): implement Phase 2.2 Android exact alarm fallback completion

- Add DailyNotificationExactAlarmManager with SCHEDULE_EXACT_ALARM permission handling
- Add DailyNotificationRebootRecoveryManager for system reboot and time-change recovery
- Update DailyNotificationScheduler with exact alarm manager integration
- Add exact alarm status checking and permission request methods
- Add windowed alarm fallback (±10m) when exact alarms are denied
- Add deep-link to exact alarm settings for user guidance
- Add reboot recovery with broadcast receiver registration
- Update TypeScript interface with new exact alarm and recovery methods
- Update web implementations with placeholder methods
- Add phase2-2-android-fallback.ts usage examples

This completes Phase 2.2 Android fallback implementation:
- Exact alarm permission handling with graceful fallback
- Windowed alarm support (±10m) for battery optimization
- Reboot and time-change recovery with broadcast receivers
- Deep-link to exact alarm settings for user enablement
- Integration with existing TTL enforcement and rolling window
- Comprehensive fallback scenarios and error handling

Files: 7 changed, 1200+ insertions(+)

src/definitions.ts

@@ -268,6 +268,24 @@ export interface DailyNotificationPlugin {
     timeUntilNextMaintenance: number;
   }>;
   
+  // Exact alarm management
+  getExactAlarmStatus(): Promise<{
+    supported: boolean;
+    enabled: boolean;
+    canSchedule: boolean;
+    fallbackWindow: string;
+  }>;
+  requestExactAlarmPermission(): Promise<void>;
+  openExactAlarmSettings(): Promise<void>;
+  
+  // Reboot recovery management
+  getRebootRecoveryStatus(): Promise<{
+    inProgress: boolean;
+    lastRecoveryTime: number;
+    timeSinceLastRecovery: number;
+    recoveryNeeded: boolean;
+  }>;
+  
   // Existing methods
   scheduleDailyNotification(options: NotificationOptions | ScheduleOptions): Promise<void>;
   getLastNotification(): Promise<NotificationResponse | null>;