fixed qudrant signature

rag/repository.py

@@ -80,7 +80,7 @@ class VectorRepository:
         )
         response = await self.db_client.query_points(
             collection_name=collection_name,
-            query_vector=query_vector,
+            vector=query_vector,
             limit=retrieval_limit,
             score_threshold=score_threshold,
         )