Apply patch [skip ci]

libs/core/langchain_core/runnables/config.py

@@ -7,6 +7,7 @@ import uuid
 import warnings
 from collections.abc import Awaitable, Generator, Iterable, Iterator, Sequence
 from concurrent.futures import Executor, Future, ThreadPoolExecutor
+from contextlib import contextmanager
 from contextvars import Context, ContextVar, Token, copy_context
 from functools import partial
 from typing import TYPE_CHECKING, Any, Callable, Optional, TypeVar, Union, cast
@@ -670,3 +671,4 @@ async def run_in_executor(
     return await asyncio.get_running_loop().run_in_executor(executor_or_config, wrapper)
 
 
+