Scope the steps schema to the release job whose preflight is executed, allowing unrelated reusable-workflow jobs such as qualification. Preserve all four valid and invalid metadata execution checks.
Reproduced on main ec3db3745: 35 passed, 4 failed. After the fix: 104 release and CI boundary tests pass; check:fast and format:check pass.
Audit actual first-parent ancestry instead of trusting the release bot
chronological cutoff, and block mismatched versions before tag creation.
Sync the published 6.0.0 baseline without dropping newer main changes.
Fixes#1063
Assisted-by: Sakuya (gensokyo-skills:sakuya-checkpointed-execution)