- persistent WS connection to HA with auth + state_changed subscription
- watchdog detects silence > 5min → emits ha_websocket_dead
- immediate ha_websocket_dead on disconnect, exponential reconnect with jitter
- cooldown prevents alert spam (10min repeat window while HA stays down)
- ha_websocket_recovered emitted on reconnect after a dead alert (allows
supervisor to clear active incidents in Phase 5)
- new monitors/ subpackage for long-running tasks (vs interval checks/)
- /health endpoint now includes ws_connected field
- 26 unit tests, 3 integration tests (real HA + container stop/restart)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Oskar Kapala
31b48d162a