at.happyproto.registry.publishRelease

Publish a version of a plugin to the caller's repo. Writes a software.release.manifest carrying the artifact, the changelog as a site.standard.document when one is given, the software.release.version, and the channel named by track, moved to the new version, in that order. A record is written only once everything it points at exists, so a failure part-way leaves no dangling reference. Calling again with the same input after such a failure finishes the release rather than refusing it.