core[patch]: fix no current event loop for sql history in async mode (#22933)
- **Description:** When use
RunnableWithMessageHistory/SQLChatMessageHistory in async mode, we'll
get the following error:
```
Error in RootListenersTracer.on_chain_end callback: RuntimeError("There is no current event loop in thread 'asyncio_3'.")
```
which throwed by
https://github.com/langchain-ai/langchain/blob/ddfbca38dfa22954eaeda38614c6e1ec0cdecaa9/libs/community/langchain_community/chat_message_histories/sql.py#L259.
and no message history will be add to database.
In this patch, a new _aexit_history function which will'be called in
async mode is added, and in turn aadd_messages will be called.
In this patch, we use `afunc` attribute of a Runnable to check if the
end listener should be run in async mode or not.
- **Issue:** #22021, #22022
- **Dependencies:** N/A
langchain
360a70c8 - core[patch]: fix no current event loop for sql history in async mode (#22933)
