Add a small example showing how to call AgentOpsGuard before LangGraph tool execution or node delegation.\n\nAcceptance criteria:\n- Add an adapter doc or minimal sample under adapters/langgraph/.\n- Show tool, call graph, and governed-channel checks.\n- Keep it dependency-light and public-safe.
Add a small example showing how to call AgentOpsGuard before LangGraph tool execution or node delegation.\n\nAcceptance criteria:\n- Add an adapter doc or minimal sample under adapters/langgraph/.\n- Show tool, call graph, and governed-channel checks.\n- Keep it dependency-light and public-safe.