Approved by Garry: the helper, not the model, decides whether evidence can
pass. materialize writes verdict {status, open} into evidence.json and prints
it: fail or blocked from row classifications, inconclusive while any row is
superseded, a complete capture is withheld, a declared required probe is
unrun or there is no evidence, else pass. The caller fixture requires
receipt.status to equal that verdict. CI late-input kept reporting pass with a
superseded happy probe.
garrytan
06545fcc30