Wires the NWS adapter to the new notification pipeline via EventBus:
- Added fine-grained weather categories: weather_watch, weather_advisory,
weather_statement (all routine severity) alongside existing weather_warning
- NWSAlertsAdapter._derive_category() maps NWS event type suffix to category:
"Warning" -> weather_warning, "Watch" -> weather_watch, etc.
- NWSAlertsAdapter.to_event() converts internal event dict to pipeline Event
with proper group_key (event_id) and inhibit_keys (Warning suppresses Watch)
- EnvironmentalStore accepts optional event_bus parameter
- EnvironmentalStore._ingest() emits new events to bus via _emit_event()
- 22 new tests in test_adapter_nws.py covering category derivation,
severity mapping, and Event field population
All 119 tests pass.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
