Adds a per-package dist_tag: true/false metadata flag (default false).
When enabled the build tool appends the RPM dist tag to the release
at build time so each distro produces a unique version in the Gitea
package registry:
release: 1 + almalinux/el9 -> PACKAGE_RELEASE=1.el9
release: 1 + fedora/43 -> PACKAGE_RELEASE=1.fc43
This ensures Gitea package existence checks don't confuse packages built
for one distro with those built for another (the original bug).
Changes:
- Add effective_release() and get_rpm_dist_tag() helpers
- Revert the broken files-endpoint check from the previous commit;
dist disambiguation is now handled purely via the release string
- discover_packages and build_single both compute the effective release
before constructing PackageInfo
- check_package_exists simplified back to a single version-level check
- dist_tag added to METADATA_SCHEMA and PackageMetadata dataclass
- All 72 metadata.yaml files updated with dist_tag: true
unkinben