- Add airquality.py: Air Quality API with current conditions, forecasts, and heatmaps
- Add pollen.py: Pollen API with forecast data and plant information
- Add routes.py: Routes API with route computation and route matrix
- Add route_optimization.py: Route Optimization API for fleet routing
- Add solar.py: Solar API for building insights and data layers
- Add weather.py: Weather API with current conditions and forecasts
- Enhance addressvalidation with better error handling
- Update client.py with new API endpoints

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

feat: add 6 new Google Maps Platform APIs and improvements

Added new test files for previously untested modules:
- tests/test_airquality.py (91 lines)
- tests/test_pollen.py (54 lines)
- tests/test_weather.py (84 lines)
- tests/test_routes.py (109 lines)
- tests/test_route_optimization.py (47 lines)
- tests/test_solar.py (49 lines)
- tests/test_exceptions.py (new file)

Enhanced existing test coverage:
- tests/test_geolocation.py: added tests for all params and error handling
- tests/test_roads.py: added tests for _roads_extract edge cases
- tests/test_distance_matrix.py: added transit_mode, transit_routing_preference, traffic_model, region tests

Registered new API methods in client.py:
- Air Quality: current_air_quality, air_quality_forecast, historical_air_quality, air_quality_heatmap_tile
- Pollen: current_pollen, pollen_forecast, pollen_heatmap_tile
- Weather: current_weather, weather_forecast, weather_hourly_forecast, historical_weather
- Routes: compute_routes, compute_route_matrix
- Route Optimization: optimize_tour
- Solar: building_insights, solar_data_layers, geo_tiff

Coverage improved from 56% to 93% (244 tests passing)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test: increase test coverage to 93%

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

test: increase test coverage across all modules

test: make legacy API error tests hermetic