Ebuilds without matching Manifest hashes cause 'Missing digest'
errors on emerge. Download DIST files and compute BLAKE2B/SHA512
for ebuilds, metadata.xml, and tarballs.
cc
Triggered by release-linux completion (same as AUR).
Updates ebuilds in vicrodh/qbz-overlay with new version.
Requires OVERLAY_PAT secret for cross-repo push.
cc