Add role-based filtering and imporve code

services/external/app/api/city_operations.py

@@ -15,7 +15,7 @@ from app.schemas.traffic import TrafficDataResponse
 from app.registry.city_registry import CityRegistry
 from app.registry.geolocation_mapper import GeolocationMapper
 from app.repositories.city_data_repository import CityDataRepository
-from app.cache.redis_cache import ExternalDataCache
+from app.cache.redis_wrapper import ExternalDataCache
 from app.services.weather_service import WeatherService
 from app.services.traffic_service import TrafficService
 from shared.routing.route_builder import RouteBuilder