alex
6085859874
feat: notification center backend integration (PR-2)
- Wire lifecycle_hooks.py to NotificationService after event bus publish
- Wire health_monitor.py to NotificationService after state changes
- Category/severity mapping: instance.* → info, error → error, unhealthy → warning
- Extend UserConfig API with notification_mute_categories and notification_toast_level
- 6 integration tests for event-to-notification flow
- All producer calls wrapped in try/except — failures logged, pipeline continues
Quality gates: pytest 41 passed (monitoring + lifecycle), ruff clean