XY-517: Reconcile retained review status with recover-diagnosed bound handoff after repair or rebase

[yvette-carlisle]

Summary

• reconcile retained review diagnose/status binding by exposing concrete marker/orchestration/PR mismatches
• allow explicit same-branch same-PR rebind refresh for stale retained markers while preserving no-op/different-PR rejection
• document stale marker recovery and active ownership restoration

Verification

• cargo make fmt
• cargo make lint-fix
• cargo make test (789 passed, 1 skipped)
• semantic drift audit: pass
• git diff --check