perf: 优化批量消息存储，使用insert().values()替代add_all()

src/chat/message_receive/storage.py

@@ -99,37 +99,55 @@ class MessageStorageBatcher:
         success_count = 0
         
         try:
-            # 准备所有消息对象
-            messages_objects = []
+            # 🔧 优化：准备字典数据而不是ORM对象，使用批量INSERT
+            messages_dicts = []
             
             for msg_data in messages_to_store:
                 try:
-                    message_obj = await self._prepare_message_object(
+                    message_dict = await self._prepare_message_dict(
                         msg_data['message'], 
                         msg_data['chat_stream']
                     )
-                    if message_obj:
-                        messages_objects.append(message_obj)
+                    if message_dict:
+                        messages_dicts.append(message_dict)
                 except Exception as e:
-                    logger.error(f"准备消息对象失败: {e}")
+                    logger.error(f"准备消息数据失败: {e}")
                     continue
             
-            # 批量写入数据库
-            if messages_objects:
+            # 批量写入数据库 - 使用高效的批量INSERT
+            if messages_dicts:
+                from sqlalchemy import insert
                 async with get_db_session() as session:
-                    session.add_all(messages_objects)
+                    stmt = insert(Messages).values(messages_dicts)
+                    await session.execute(stmt)
                     await session.commit()
-                    success_count = len(messages_objects)
+                    success_count = len(messages_dicts)
             
             elapsed = time.time() - start_time
             logger.info(
                 f"批量存储了 {success_count}/{len(messages_to_store)} 条消息 "
-                f"(耗时: {elapsed:.3f}秒)"
+                f"(耗时: {elapsed:.3f}秒, 平均 {elapsed/max(success_count,1)*1000:.2f}ms/条)"
             )
 
         except Exception as e:
             logger.error(f"批量存储消息失败: {e}", exc_info=True)
 
+    async def _prepare_message_dict(self, message, chat_stream):
+        """准备消息字典数据（用于批量INSERT）
+        
+        这个方法准备字典而不是ORM对象，性能更高
+        """
+        message_obj = await self._prepare_message_object(message, chat_stream)
+        if message_obj is None:
+            return None
+        
+        # 将ORM对象转换为字典（只包含列字段）
+        message_dict = {}
+        for column in Messages.__table__.columns:
+            message_dict[column.name] = getattr(message_obj, column.name)
+        
+        return message_dict
+
     async def _prepare_message_object(self, message, chat_stream):
         """准备消息对象（从原 store_message 逻辑提取）"""
         try: