PipelineTarget.repos (additive, `= absent`, epoch stays v2) names the
campaign's whole repo set from that revision on; repos_in_force is the one
owner of cut_spec membership and replaces the direct campaign.repos check;
a revision past the first may not empty the set its predecessor named
(EmptyRepos on the target id). Golden line and regenerated schemas follow
in the next commit (ruling campaign-repo-set-home).
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
9298371f95