producer differential

Workflow runs for producer differential

• ci: fail loudly when the comparator is absent, and let a dispatch nam…

  completed successfully:
  producer differential#3:Commit42413acpushedbyPhysShell
  claude/parallel-producer-tests-a5g495

  Jul 29, 20267s
  More actions for workflow run 3

• fix(ci): keep the differential's worktrees out of the checked-out repo

  completed successfully:
  producer differential#2:Commit8e5a67dpushedbyPhysShell
  claude/parallel-producer-tests-a5g495

  Jul 29, 202629s
  More actions for workflow run 2

• feat(producer): physical-anchor column, its fixture contract, and the…

  completed successfully:
  producer differential#1:Commited9bd1bpushedbyPhysShell
  claude/parallel-producer-tests-a5g495

  Jul 29, 202610s
  More actions for workflow run 1