Ruling one-live-self-run, decided where batches are serialized: run_rule
(was run_claims_rule) now also refuses an opening or reinstated run whose
instance and turn already have an in-force operated_by Mind run. The
fixture run() is an operator's run; mind_run() is hers. Unverified: this
commit has not been built when written; verification follows.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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