feat(rag): make embedding and retrieving available

pkg/rag/knowledge/services/base_service.py

@@ -1,26 +1,15 @@
 # 封装异步操作
 import asyncio
-import logging
-from pkg.rag.knowledge.services.database import SessionLocal 
+
 
 class BaseService:
     def __init__(self):
-        self.logger = logging.getLogger(self.__class__.__name__)
-        self.db_session_factory = SessionLocal
+        pass
 
     async def _run_sync(self, func, *args, **kwargs):
         """
         在单独的线程中运行同步函数。
         如果第一个参数是 session，则在 to_thread 中获取新的 session。
         """
-        
-        if getattr(func, '__name__', '').startswith('_db_'): 
-            session = await asyncio.to_thread(self.db_session_factory)
-            try:
-                result = await asyncio.to_thread(func, session, *args, **kwargs)
-                return result
-            finally:
-                session.close()
-        else:
-            # 否则，直接运行同步函数
-            return await asyncio.to_thread(func, *args, **kwargs)
+
+        return await asyncio.to_thread(func, *args, **kwargs)