修复了一些已知问题

backend/utils/redis_client.py

@@ -130,7 +130,7 @@ class RedisClient:
         key = f"login_attempts:{username}"
         attempts = await RedisClient.get(key)
         attempts = int(attempts) + 1 if attempts else 1
-        await RedisClient.set(key, attempts, 900)  # 15分钟锁定
+        await RedisClient.set(key, attempts, 300)  # 5分钟锁定
         return attempts
     
     @staticmethod