d13c9f840 made the release `qualification` job call a reusable workflow,
so it declares `uses` and no `steps`. The release checkpoint test parsed
every job with required `steps`, so all four preflight cases failed with
a ZodError on main and in every PR's boundary shard. Only the inspected
release-please and merged-release jobs need steps; make the field
optional per job.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>