GPG-signing the RPMs rewrites their bytes after release.yml has already
generated SBOMs, the packages checksum manifest, and attestations from
the as-built files. The new workflow_dispatch-only finalize-release lane
runs between signing and publishing: it refuses non-Draft releases,
verifies the signed RPMs against their sha256 sidecars and the committed
PGSTY public key, confirms every other package still matches the
original manifest, regenerates the RPM SBOMs and the manifest from the
published bytes, cosign-signs the manifest under the workflow identity,
and attests the finalized set before replacing the assets in place.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Feng Ruohang