The version resource a PaperTrail-tracked blog resource keeps its history in: the table, its foreign key to the record, and the actions and policies that read the history.

paper_trail do
  mixin {MishkaBlog.Resources.Mixins.PaperTrailMixin, :postgres, ["mishka_blog_tag_versions"]}
end

The versions are global rather than per site, so a record's history can be read across sites by a master. The foreign key cascades, so deleting the record deletes its versions.

The version resource gets these read actions, all bypassing the tenant:

• :get_any - One version by id.
• :read_any - Every version.
• :sorted_versions - Every version, newest first, paginated.

A version holds a full copy of its record, drafts included, so it is for an admin however it is reached, the record's own history included: a master reads every site's, a site's admin its own site's. A call made with authorize?: false is not checked.