修改引用逻辑，修改长期记忆bug

app/rag/pipeline.py

@@ -2,15 +2,13 @@
 
 import asyncio
 import os
-from typing import List, Optional
+from typing import List
 from langchain_core.documents import Document
 from langchain_core.language_models import BaseLanguageModel
 
-from .retriever import create_qdrant_client  # 可能不需要直接使用
-from .reranker import LLaMaCPPReranker
-from .query_transform import MultiQueryGenerator
-from .fusion import reciprocal_rank_fusion
-
+from app.rag.reranker import LLaMaCPPReranker
+from app.rag.query_transform import MultiQueryGenerator
+from app.rag.fusion import reciprocal_rank_fusion
 
 class RAGPipeline:
     """