修改引用逻辑，修改长期记忆bug

app/rag/__init__.py

@@ -13,7 +13,7 @@ RAG 检索与生成模块
     用户查询 → 多路改写 → 并行检索 → RRF 融合 → 重排序 → 返回父文档
 
 示例用法：
-    >>> from app.rag import RAGPipeline, create_rag_tool
+    >>> from app.rag.rag import RAGPipeline, create_rag_tool
     >>> from rag_indexer.builder import IndexBuilder, IndexBuilderConfig
     >>> from langchain_openai import ChatOpenAI
     >>>
@@ -34,16 +34,16 @@ RAG 检索与生成模块
     >>> rag_tool = create_rag_tool(retriever=retriever, llm=llm)
 """
 
-from .retriever import (
+from app.rag.retriever import (
     create_base_retriever,
     create_hybrid_retriever,
     create_qdrant_client,
 )
-from .reranker import LLaMaCPPReranker
-from .query_transform import MultiQueryGenerator
-from .fusion import reciprocal_rank_fusion
-from .pipeline import RAGPipeline
-from .tools import create_rag_tool, create_rag_tool_sync
+from app.rag.reranker import LLaMaCPPReranker
+from app.rag.query_transform import MultiQueryGenerator
+from app.rag.fusion import reciprocal_rank_fusion
+from app.rag.pipeline import RAGPipeline
+from app.rag.tools import create_rag_tool_sync
 
 
 __all__ = [
@@ -65,6 +65,5 @@ __all__ = [
     "RAGPipeline",
     
     # 工具创建（供 Agent 使用）
-    "create_rag_tool",
     "create_rag_tool_sync",
 ]