The artifactapi server gains a github_rpm remote type that exposes a GitHub
repo's releases as a metadata-only yum repository (synthesized repodata, no
precache, downloads redirected to a backend remote). Surface it through the
provider so these remotes are declarable as code alongside the other types.
- Register the github_rpm remote resource (artifactapi_remote_github_rpm),
reusing the shared remoteResource plumbing; add the NewRemoteGitHubRPM
constructor to match its siblings.
- Generalize the releases_remote attribute description: it now names the
backend remote that serves download bytes for both the terraform remote
(URL rewriting) and the github_rpm remote (302 redirect of .rpm downloads).
- Document the type and add an example wiring a github_rpm remote to a generic
github.com releases_remote.
Tests cover the resource metadata type name, the constructor, and mapping of
package_type/base_url/releases_remote/patterns through the API model; the
resource-count and expected-types assertions are updated.
Depends on the github_rpm API surface in artifactapi (separate PR). Cut a
minor release (make minor) once merged.
unkinben