参数配置统一

backend/app/rag/__init__.py

@@ -37,7 +37,6 @@ RAG 检索与生成模块
 from .retriever import (
     create_base_retriever,
     create_hybrid_retriever,
-    create_qdrant_client,
 )
 from .reranker import LLaMaCPPReranker
 from .query_transform import MultiQueryGenerator
@@ -50,7 +49,6 @@ __all__ = [
     # 检索器工厂函数
     "create_base_retriever",
     "create_hybrid_retriever",
-    "create_qdrant_client",
     
     # 重排序器
     "LLaMaCPPReranker",