release: v1.6.1 - Weather forecasts, sun times, air quality

- Weather fetch now returns 7-day forecasts with UV index
- New /volatile/fetch/sun/{city} endpoint for sunrise/sunset
- New /volatile/fetch/air_quality/{city} endpoint for AQI and pollutants
- OpenMeteoProvider now implements AirQualityProvider interface

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/routers/volatile.py

@@ -411,6 +411,98 @@ async def fetch_crypto(
     }
 
 
+@router.post("/fetch/sun/{city}")
+async def fetch_sun_times(
+    city: str,
+    user: str = Query(default=DEFAULT_USER, description="User identifier"),
+    ttl: int = Query(default=86400, ge=60, le=604800, description="TTL in seconds"),
+    qdrant: QdrantDep = None,
+    ollama: OllamaDep = None,
+    api_key: str = Depends(verify_api_key)
+):
+    """
+    Fetch sunrise/sunset times for a city and store in volatile cache.
+
+    Fetches from Open-Meteo API. Useful for home automation triggers.
+
+    **Example:**
+    ```
+    POST /volatile/fetch/sun/rotterdam?user=jpmschweitzer
+    ```
+
+    **Response data includes:**
+    - sunrise/sunset times (both HH:MM and ISO formats)
+    - daylight_duration_seconds
+    - daylight_hours
+    - Natural language text summary
+    """
+    volatile_service = get_volatile_service(qdrant, ollama)
+    weather_provider = get_weather_provider()
+
+    fetch_service = VolatileFetchService(
+        volatile_service=volatile_service,
+        weather_provider=weather_provider,
+    )
+
+    result = await fetch_service.fetch_sun_times(user, city, ttl=ttl)
+
+    if not result.success:
+        raise HTTPException(status_code=500, detail=result.error)
+
+    return {
+        "success": True,
+        "namespace": result.namespace,
+        "key": result.key,
+        "record": result.record,
+    }
+
+
+@router.post("/fetch/air_quality/{city}")
+async def fetch_air_quality(
+    city: str,
+    user: str = Query(default=DEFAULT_USER, description="User identifier"),
+    ttl: int = Query(default=3600, ge=60, le=86400, description="TTL in seconds"),
+    qdrant: QdrantDep = None,
+    ollama: OllamaDep = None,
+    api_key: str = Depends(verify_api_key)
+):
+    """
+    Fetch air quality data for a city and store in volatile cache.
+
+    Fetches from Open-Meteo Air Quality API.
+
+    **Example:**
+    ```
+    POST /volatile/fetch/air_quality/rotterdam?user=jpmschweitzer
+    ```
+
+    **Response data includes:**
+    - European and US AQI indices
+    - Pollutants: PM2.5, PM10, ozone, nitrogen dioxide, etc.
+    - Pollen data (European locations, seasonal)
+    - Natural language text summary
+    """
+    volatile_service = get_volatile_service(qdrant, ollama)
+    weather_provider = get_weather_provider()
+
+    fetch_service = VolatileFetchService(
+        volatile_service=volatile_service,
+        weather_provider=weather_provider,
+    )
+
+    result = await fetch_service.fetch_air_quality(user, city, ttl=ttl)
+
+    if not result.success:
+        raise HTTPException(status_code=500, detail=result.error)
+
+    return {
+        "success": True,
+        "namespace": result.namespace,
+        "key": result.key,
+        "record": result.record,
+    }
+
+
 @router.get("/{namespace}/{key}", response_model=VolatileRecordResponse)
 async def get_record(
     namespace: str,