[Feature Request] Example with LangGraph

Is your feature request related to a problem? Please describe.

How can we use temporal with LangGraph workflows - https://github.com/langchain-ai/langgraph? Could you give a example?

Describe the solution you'd like

LangGraph is typically used in agentic workflows and using temporal would give us the ability to scale execution.

Additional context

None

该 issue 指向 samples-python 仓库和链接的 LangGraph 项目；首先查看现有的 Python 示例和 LangGraph 工作流。定义该示例支持的工作流，并验证它演示了将 Temporal 与 LangGraph 结合用于可扩展执行。提供一个可运行的示例，并附有足够的使用指南以便复现，即表示完成。