fix: 捕获更多断线异常并优化重试逻辑，确保更稳健的数据库连接

DB.py

@@ -94,8 +94,7 @@ video_author = Table(
 
 def mysql_retry(max_retries: int = 3, base_delay: float = 2.0):
     """
-    装饰器工厂：捕获 InterfaceError 后断线重连并重试，
-    重试间隔按指数级增长：base_delay * 2**(attempt-1) 秒。
+    装饰器：捕获断线异常（InterfaceError 或 OperationalError: 2013）后尝试重连，指数回退重试。
     """
 
     def decorator(fn):
@@ -103,16 +102,17 @@ def mysql_retry(max_retries: int = 3, base_delay: float = 2.0):
         def wrapper(self, *args, **kwargs):
             for attempt in range(1, max_retries + 1):
                 try:
-                    # 确保连接存活，reconnect=True 会在 ping 失败时重连
                     self.conn.ping(reconnect=True)
                     return fn(self, *args, **kwargs)
-                except pymysql.InterfaceError as e:
+                except (pymysql.InterfaceError, pymysql.OperationalError) as e:
+                    if isinstance(e, pymysql.OperationalError) and e.args[0] != 2013:
+                        raise  # 只处理 2013，其他 OperationalError 抛出
                     wait = base_delay * (2 ** (attempt - 1))
-                    logger.info(f"[MySQL][{fn.__name__}] 第{attempt}次 InterfaceError：{e}，等待 {wait:.1f}s 后重连…")
+                    logger.warning(f"[MySQL][{fn.__name__}] 第{attempt}次重试（断开连接：{e}），等待 {wait:.1f}s 后重连…")
                     time.sleep(wait)
                     self._reconnect_mysql()
                     if attempt == max_retries:
-                        logger.info("[MySQL] 重试多次仍失败，抛出异常")
+                        logger.error("[MySQL] 重试多次仍失败，抛出异常")
                         raise
 
         return wrapper