feat: Implement hybrid search in SQLite-vec

Signed-off-by: Varsha Prasad Narsing <varshaprasad96@gmail.com>

llama_stack/providers/remote/vector_io/weaviate/weaviate.py

@@ -92,6 +92,15 @@ class WeaviateIndex(EmbeddingIndex):
     ) -> QueryChunksResponse:
         raise NotImplementedError("Keyword search is not supported in Weaviate")
 
+    async def query_hybrid(
+        self,
+        embedding: NDArray,
+        query_string: str,
+        k: int,
+        score_threshold: float,
+    ) -> QueryChunksResponse:
+        raise NotImplementedError("Hybrid search is not supported in Weaviate")
+
 
 class WeaviateVectorIOAdapter(
     VectorIO,