feat:新增投顾agent和nl2sqlagent

repositories/sys_message.py

@@ -10,6 +10,15 @@ from repositories.base import BaseRepository
 class SysMessageRepo(BaseRepository):
     model = SysMessage
 
+    async def get_by_biz_id(self, biz_id: str, *, user_id: int) -> SysMessage | None:
+        """按收件人和业务号查询已写入的站内信，供发送重试幂等使用。"""
+        return await self.db.scalar(
+            select(SysMessage).where(
+                SysMessage.biz_id == biz_id,
+                SysMessage.user_id == user_id,
+            )
+        )
+
     async def list_by_user(
         self, user_id: int, limit: int = 100, offset: int = 0
     ) -> list[SysMessage]: