Replaces the AlarmManager-based polling (wake every 60s, open/close WebSocket
connections) with a persistent WebSocket subscription to a Nostr relay. Events
are delivered in real-time via the open connection. A partial WakeLock keeps
the connection alive through Doze mode (same approach as Signal without FCM).
- Add NotificationRelayService: foreground service with persistent WebSocket,
exponential backoff reconnection, network-aware reconnect, relay rotation
on failure, and SharedPreferences config listener
- Refactor NostrPoller into notification dispatcher with metadata caching
(SharedPreferences-based, avoids redundant WebSocket connections for
repeat authors)
- Remove NotificationService (AlarmManager scheduler) and PollAlarmReceiver
(WakeLock-based polling)
- Remove SCHEDULE_EXACT_ALARM permission (no longer needed)
- Disable web-layer background refetch on native (persistent connection
handles it)
Chad Curtis
6066b5ec49