feat: implement 429 auto-retry exponential backoff to handle free tier Gemini rate limits

templates/agent_executor.py

@@ -133,9 +133,19 @@ class SwarmAgent:
             "tools": tools
         }
         
-        req = urllib.request.Request(url, data=json.dumps(payload).encode('utf-8'), headers=headers, method='POST')
-        with urllib.request.urlopen(req) as res:
-            return json.loads(res.read().decode('utf-8'))
+        for attempt in range(5):
+            try:
+                req = urllib.request.Request(url, data=json.dumps(payload).encode('utf-8'), headers=headers, method='POST')
+                with urllib.request.urlopen(req) as res:
+                    return json.loads(res.read().decode('utf-8'))
+            except urllib.error.HTTPError as e:
+                if e.code == 429:
+                    wait_time = (attempt + 1) * 8
+                    print(f" [W] Rate Limit (429) detectado. Aguardando {wait_time} segundos antes de tentar novamente (tentativa {attempt + 1}/5)...")
+                    time.sleep(wait_time)
+                else:
+                    raise e
+        raise Exception("Falha após 5 tentativas devido a limite de requisições (429).")
 
     def execute(self):
         self.setup_workspace()