feat: implement automatic purging of old media and schedule its daily execution via cron.

server/cron.ts

@@ -1,6 +1,7 @@
 import cron from 'node-cron';
 import { TokenManager } from './services/token_manager';
 import { AnalyticsService } from './services/analytics';
+import { purgeOldMedia } from './services/media-purge';
 
 export function startTokenCron() {
     // Run every day at midnight (00:00) — Token health check
@@ -20,4 +21,15 @@ export function startTokenCron() {
         }
     });
     console.log('[Cron] Analytics sync job scheduled (0 8,20 * * *).');
+
+    // Run every day at 03:00 AM — Cleanup old media from Cloudinary and DB
+    cron.schedule('0 3 * * *', async () => {
+        console.log('[Cron] Running daily media purge check...');
+        try {
+            await purgeOldMedia();
+        } catch (error) {
+            console.error('[Cron] Media purge check failed:', error);
+        }
+    });
+    console.log('[Cron] Media purge job scheduled (0 3 * * *).');
 }