langchain

c98994c3 - docs: Improve notebook to show how to use tidb to store history messages (#16420)

docs: Improve notebook to show how to use tidb to store history messages (#16420) After merging [PR #16304](https://github.com/langchain-ai/langchain/pull/16304), I realized that our notebook example for integrating TiDB with LangChain was too basic. To make it more useful and user-friendly, I plan to create a detailed example. This will show how to use TiDB for saving history messages in LangChain, offering a clearer, more practical guide for our users