fix: retry Brave Search on HTTP 429 rate limit with 1s delay (#20255)

* Update brave.py

* Update brave.py

backend/open_webui/retrieval/web/brave.py

@@ -1,4 +1,5 @@
 import logging
+import time
 from typing import Optional
 
 import requests
@@ -25,6 +26,14 @@ def search_brave(
     params = {"q": query, "count": count}
 
     response = requests.get(url, headers=headers, params=params)
+
+    # Handle 429 rate limiting - Brave free tier allows 1 request/second
+    # If rate limited, wait 1 second and retry once before failing
+    if response.status_code == 429:
+        log.info("Brave Search API rate limited (429), retrying after 1 second...")
+        time.sleep(1)
+        response = requests.get(url, headers=headers, params=params)
+
     response.raise_for_status()
 
     json_response = response.json()