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/apis/__init__.py

@@ -27,6 +27,9 @@ from .base import (
     DayForecast,
     WeatherForecast,
     GeoLocation,
+    SunTimes,
+    # Air quality models
+    AirQuality,
     # News models
     NewsItem,
     NewsFeed,
@@ -34,6 +37,7 @@ from .base import (
     StockQuote,
     # Abstract providers
     WeatherProvider,
+    AirQualityProvider,
     NewsProvider,
     FinancialProvider,
 )
@@ -53,8 +57,12 @@ __all__ = [
     "DayForecast",
     "WeatherForecast",
     "GeoLocation",
+    "SunTimes",
     "WeatherProvider",
     "OpenMeteoProvider",
+    # Air quality
+    "AirQuality",
+    "AirQualityProvider",
     # News
     "NewsItem",
     "NewsFeed",