feat: add data sources config system and Earth API integration

- Add data_sources.yaml for configurable data source URLs
- Add data_sources.py to load config with database override support
- Add arcgis_landing_points and arcgis_cable_landing_relation collectors
- Change visualization API to query arcgis_landing_points
- Add /api/v1/datasources/configs/all endpoint
- Update Earth to fetch from API instead of static files
- Fix scheduler collector ID mappings

frontend/public/earth/js/cables.js

@@ -128,7 +128,7 @@ export async function loadGeoJSONFromPath(scene, earthObj) {
     console.log('正在加载电缆数据...');
     showStatusMessage('正在加载电缆数据...', 'warning');
     
-    const response = await fetch(PATHS.geoJSON);
+    const response = await fetch(PATHS.cablesApi);
     if (!response.ok) {
       throw new Error(`HTTP错误: ${response.status}`);
     }
@@ -161,7 +161,7 @@ export async function loadGeoJSONFromPath(scene, earthObj) {
       if (!geometry || !geometry.coordinates) continue;
       
       const color = getCableColor(properties);
-      console.log('电缆:', properties.Name, '颜色:', color);
+      console.log('电缆 properties:', JSON.stringify(properties));
       
       if (geometry.type === 'MultiLineString') {
         for (const lineCoords of geometry.coordinates) {
@@ -239,7 +239,7 @@ export async function loadLandingPoints(scene, earthObj) {
   try {
     console.log('正在加载登陆点数据...');
     
-    const response = await fetch('./landing-point-geo.geojson');
+    const response = await fetch(PATHS.landingPointsApi);
     if (!response.ok) {
       console.error('HTTP错误:', response.status);
       return;