fix(rag): use query_points instead of deprecated search method

qdrant-client 1.17.0 removed the search() method in favor of
query_points(). Update the wrapper to use the new API.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

rag-service/qdrant_client_wrapper.py

@@ -167,12 +167,13 @@ class QdrantClientWrapper:
                     )
             qdrant_filter = qmodels.Filter(must=must_conditions)
 
-        results = self.client.search(
+        results = self.client.query_points(
             collection_name=collection,
-            query_vector=query_vector,
+            query=query_vector,
             limit=limit,
             query_filter=qdrant_filter,
             score_threshold=score_threshold,
+            with_payload=True,
         )
 
         return [
@@ -181,7 +182,7 @@ class QdrantClientWrapper:
                 "score": hit.score,
                 "payload": hit.payload or {},
             }
-            for hit in results
+            for hit in results.points
         ]
 
     # ------------------------------------------------------------------