chore: add README

fix: fix status inconsistency and demo API error

feat: create simple demo to showcase crash recovery

feat: implement fault injection

feat: implement cmd_recover

fix: fix spelling error

feat: add idempotency into `build_graph`

feat: implement basic idempotency for tools

feat: extend db with tool call intents

fix: fix import issues and db error

fix: improve tool call parsing

feat: make CLI available via main entry point

implement CLI inspect command

feat: implement reference ReAct LangGraph agent

feat: implement write-ahead step logger