feat(analytics): resilient Graph API calls, CRON sync every 6h, polling frontend, engagement+views metrics

server/cron.ts

@@ -1,11 +1,23 @@
 import cron from 'node-cron';
 import { TokenManager } from './services/token_manager';
+import { AnalyticsService } from './services/analytics';
 
 export function startTokenCron() {
-    // Run every day at midnight (00:00)
+    // Run every day at midnight (00:00) — Token health check
     cron.schedule('0 0 * * *', async () => {
         console.log('[Cron] Running daily token check...');
         await TokenManager.checkAndRefreshTokens();
     });
     console.log('[Cron] Token refresh job scheduled (0 0 * * *).');
+
+    // Run every 6 hours — Analytics sync for all pages
+    cron.schedule('0 */6 * * *', async () => {
+        console.log('[Cron] Running analytics sync for all pages...');
+        try {
+            await AnalyticsService.syncAllPages();
+        } catch (error) {
+            console.error('[Cron] Analytics sync failed:', error);
+        }
+    });
+    console.log('[Cron] Analytics sync job scheduled (0 */6 * * *).');
 }