v0.2.1

Added

• Added model-mirror version and model-mirror version --json to compare the
  installed distribution with PyPI and show published release notes when an
  update is available.

Changed

• All repo-targeted commands now use the configured repo_type when
  --repo-type is omitted. The initial configured default remains model.
• Archive-wide list and status still include every repo type, while torrent
  imports continue to use the type embedded in the publication descriptor.