feat(earth): add cable-landing point relation via city_id

Backend:
- Fix arcgis_landing collector to extract city_id
- Fix arcgis_relation collector to extract city_id
- Fix convert_landing_point_to_geojson to use city_id mapping

Frontend:
- Update landing point cableNames to use array
- Add applyLandingPointVisualState for cable lock highlight
- Dim all landing points when satellite is locked

backend/app/services/collectors/arcgis_landing.py

@@ -59,6 +59,7 @@ class ArcGISLandingPointCollector(BaseCollector):
                     "unit": "",
                     "metadata": {
                         "objectid": props.get("OBJECTID"),
+                        "city_id": props.get("city_id"),
                         "cable_id": props.get("cable_id"),
                         "cable_name": props.get("cable_name"),
                         "facility": props.get("facility"),