fix: use forEach instead of for-of to iterate Map entries

app/lib/uploadRateLimiter.ts

@@ -60,11 +60,11 @@ export function checkUploadRateLimit(ipAddress: string): { allowed: boolean; rem
  */
 export function cleanupRateLimitStore() {
   const now = Date.now();
-  for (const [key, entry] of rateLimitStore.entries()) {
+  rateLimitStore.forEach((entry, key) => {
     if (now > entry.resetAt) {
       rateLimitStore.delete(key);
     }
-  }
+  });
 }
 
 // Auto-cleanup every 10 minutes