修改rag，实现混合检索

tools/test/reset_qdrant.py

@@ -0,0 +1,41 @@
+#!/usr/bin/env python3
+"""
+删除 Qdrant 集合并重新索引
+"""
+
+import asyncio
+import os
+import sys
+
+# 添加项目根目录到 Python 路径
+project_root = os.path.join(os.path.dirname(__file__), "..", "..")
+sys.path.insert(0, os.path.join(project_root, "backend"))
+sys.path.insert(0, project_root)
+
+from rag_core import QdrantVectorStore
+from app.model_services import get_embedding_service
+
+
+async def delete_and_recreate():
+    """删除并重新创建集合"""
+    print("="*70)
+    print("删除旧集合并重新创建...")
+    print("="*70)
+    
+    embeddings = get_embedding_service()
+    vs = QdrantVectorStore(collection_name="rag_documents", embeddings=embeddings)
+    
+    # 删除旧集合
+    try:
+        vs.delete_collection()
+        print("✅ 旧集合已删除")
+    except Exception as e:
+        print(f"⚠️ 删除集合时出错（可能不存在）: {e}")
+    
+    # 重新创建
+    vs.create_collection()
+    print("✅ 新集合已创建")
+
+
+if __name__ == "__main__":
+    asyncio.run(delete_and_recreate())