feat(config): make ArcGIS data source URLs configurable

- Add ARCGIS_CABLE_URL, ARCGIS_LANDING_POINT_URL, ARCGIS_CABLE_LANDING_RELATION_URL to config
- Use @property to read URL from settings in collectors
- URLs can now be configured via environment variables

backend/app/core/config.py

@@ -27,6 +27,10 @@ class Settings(BaseSettings):
 
     CORS_ORIGINS: List[str] = ["http://localhost:3000", "http://localhost:8000"]
 
+    ARCGIS_CABLE_URL: str = "https://services.arcgis.com/6DIQcwlPy8knb6sg/ArcGIS/rest/services/SubmarineCables/FeatureServer/2/query"
+    ARCGIS_LANDING_POINT_URL: str = "https://services.arcgis.com/6DIQcwlPy8knb6sg/ArcGIS/rest/services/SubmarineCables/FeatureServer/1/query"
+    ARCGIS_CABLE_LANDING_RELATION_URL: str = "https://services.arcgis.com/6DIQcwlPy8knb6sg/ArcGIS/rest/services/SubmarineCables/FeatureServer/3/query"
+
     @property
     def REDIS_URL(self) -> str:
         return os.getenv(