Update config.py

config.py

@@ -13,7 +13,7 @@ FORCE_SUB_CHANNEL_USERNAME = os.getenv("FORCE_SUB_CHANNEL_USERNAME")
 FORWARD_CHANNEL_ID = int(os.getenv("FORWARD_CHANNEL_ID"))
 
 # --- Performance Tuning ---
-CONCURRENT_WORKERS = int(os.getenv("CONCURRENT_WORKERS", "4"))
+CONCURRENT_WORKERS = int(os.getenv("CONCURRENT_WORKERS", "1"))
 
 # --- Database ---
 os.makedirs("data", exist_ok=True)