* feat: add configurable model tiers and advisory freshness
* fix: disclose role selections before Claude review execution
* fix: reject malformed model policies and keep model pins portable
* fix: separate readiness diagnostics and bound version checks
* fix: preserve actionable model failures and validate review inputs before probes
* fix: retry released probe locks and retain late-rejection repair context
* feat: finalize configurable model tiers and verified release repairs
* fix: preserve strict model policy reads on Windows
* fix: keep fixture probes read-only and clarify pending CEO decisions
* fix: verify native terminal closure before bounded descriptor settlement
