- add config v2 with fixed judge model selection and fail-closed v1 enforce migration to shadow
- add built-in high-risk override for irreversible, publish, system, and credential shapes that always defers to the human
- remove the promotion gate, promotion records tool, and their tests
- fail closed with judge_model_unavailable when a configured judge model cannot be resolved
- notify once per session in enforce mode with the judge model and risk contract
- add ADR 0008 and update README and CONTEXT