fix

vllm/distributed/kv_transfer/kv_connector/v1/nixl_connector.py

@@ -1,5 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+from typing import Optional
+
 import contextlib
 import copy
 import logging