🐛 修复去重添加没有正确工作的bug

nonebot_plugin_tetris_stats/db/__init__.py

@@ -1,3 +1,4 @@
+from asyncio import Lock
 from collections.abc import AsyncGenerator
 from contextlib import asynccontextmanager
 from datetime import datetime, timezone
@@ -72,9 +73,11 @@ async def create_or_update_bind(
 
 T = TypeVar('T', 'TETRIOHistoricalData', 'TOPHistoricalData', 'TOSHistoricalData')
 
+lock = Lock()
+
 
 async def anti_duplicate_add(cls: type[T], model: T) -> None:
-    async with get_session() as session:
+    async with lock, get_session() as session:
         result = (
             await session.scalars(
                 select(cls)