added elasticsearch support

backend/open_webui/retrieval/vector/connector.py

@@ -16,6 +16,10 @@ elif VECTOR_DB == "pgvector":
     from open_webui.retrieval.vector.dbs.pgvector import PgvectorClient
 
     VECTOR_DB_CLIENT = PgvectorClient()
+elif VECTOR_DB == "elasticsearch":
+    from open_webui.retrieval.vector.dbs.elasticsearch import ElasticsearchClient 
+
+    VECTOR_DB_CLIENT = ElasticsearchClient()
 else:
     from open_webui.retrieval.vector.dbs.chroma import ChromaClient