Add build-xbps tag job to release.yml: verifies the tag against
src/vocalinux/version.py, fails closed when XBPS_SIGNING_KEY is unset,
builds and signs via podman-only repo.sh, and attaches packages,
signatures, repodata, and client key files to the release. Fold the
xbps-repo artifact into publish-checksums (manifest + SHA256SUMS).
Document the Void install in the root README (glibc x86_64 scope,
fingerprint check, third-party repo caveat) and the post-tag template
version/checksum bump as a pull request in docs/RELEASE_PROCESS.md.
Proof: local podman run with a throwaway RSA4096 key built all four
templates, signed packages + repodata, and verified voculinux installs
from the signed repo in a clean rootdir (fingerprint
eb:29:5d:9e:5c:94:c1:63:ae:35:cd:35:db:7a:28:da).
soubarnak
da450e32db