LangGraph 0.4 State Machines: Persistence, Branching, Human-in-Loop

本文以日语发表。中文摘要如下：

LangGraph 0.4 State Machines: Persistence, Branching, Human-in-Loop—Designing LangGraph 0.4 state machines: persistence with Postgres/Redis Checkpointer, conditional branching, human-in-the-loop nodes, resumability and timeout patterns.