minor change

doc_searcher.py

@@ -102,12 +102,12 @@ class DocSearcher:
     async def search_temp(self, text: str):
         
         dense_query = self.model.encode(text).tolist()
-        sparse_query = next(self.sparse_model.query_embed(text))
+        # sparse_query = next(self.sparse_model.query_embed(text))
 
         prefetch = [
                 models.Prefetch(
                     query=dense_query,
-                    using=DENSE_MODEL,
+                    using="Qwen/Qwen3-Embedding-0.6B",
                     limit=100
                 ),
                 # models.Prefetch(