feat: Prepare Zemailnator for Dokploy deployment

- Add highly optimized Dockerfile with Nginx and PHP-FPM 8.4
- Add docker-compose.yml configured with Redis and MariaDB 10.11
- Implement entrypoint.sh and supervisord.conf for background workers
- Refactor legacy IMAP scripts into scheduled Artisan Commands
- Secure app by removing old routes with hardcoded basic auth credentials
- Configure email attachments to use Laravel Storage instead of insecure public/tmp

app/Http/Controllers/PaymentCancelController.php

@@ -18,7 +18,7 @@ class PaymentCancelController extends Controller
 
         Log::info('PaymentCancelController: Cancellation page accessed', [
             'user_id' => auth()->id(),
-            'session_token' => $sessionToken ? substr($sessionToken, 0, 20) . '...' : 'none',
+            'session_token' => $sessionToken ? substr($sessionToken, 0, 20).'...' : 'none',
             'ip_address' => $request->ip(),
             'user_agent' => $request->userAgent(),
         ]);
@@ -48,4 +48,4 @@ class PaymentCancelController extends Controller
             'recentSubscription' => $recentSubscription,
         ]);
     }
-}
+}