fix: MySQL 连接池断开时主动重建而非跳过

_ensure_db_connection: SELECT 1 探活，失败则 close + reinit 重建连接池

app/core/scheduler.py

@@ -179,18 +179,29 @@ async def _get_active_proxy() -> "str | None":
     return None
 
 
-async def company_cleaning_job():
-    """每5分钟执行：自动清洗待处理公司数据"""
+async def _ensure_db_connection():
+    """确保 MySQL 连接池可用，不可用时重建"""
     from tortoise import Tortoise
-    from app.services.company_cleaner import company_cleaner
+    from app.settings import TORTOISE_ORM
 
-    # 检查连接池是否可用，不可用则跳过本轮
     try:
         conn = Tortoise.get_connection("default")
         await conn.execute_query("SELECT 1")
     except Exception as e:
-        logger.warning(f"company_cleaning_job skipped: DB connection unavailable: {e}")
-        return
+        logger.warning(f"MySQL 连接池不可用({e})，尝试重建...")
+        try:
+            await Tortoise.close_connections()
+        except Exception:
+            pass
+        await Tortoise.init(config=TORTOISE_ORM)
+        logger.info("MySQL 连接池重建成功")
+
+
+async def company_cleaning_job():
+    """每5分钟执行：自动清洗待处理公司数据"""
+    from app.services.company_cleaner import company_cleaner
+
+    await _ensure_db_connection()
 
     task_id = str(uuid.uuid4())
     started_at = datetime.now()