workflow-authoring: warn that re-running a subset of reviewer lenses keyed by a free-text schema field silently verifies nothing

A verify/fix workflow re-ran only the reviewers that had found blocking issues. It selected them by matching each reviewer's self-reported free-text lens field (for example "regression-on-existing-views-plus-battery") against the script's own lens keys ("regression"). Nothing matched, so the failed lens was replaced by null, the blocking-findings count fell to 0, and the workflow went on as if verified. A check ran, reported success, and measured nothing.

The Quality patterns section of the workflow-authoring reference covers verify/fix loops but has no warning for this shape. Suggested addition:

When a verify/fix loop re-runs a subset of lenses, key the subset by the script's own lens key — carry it in a closure, or use an enum-constrained schema field whose permitted values are exactly those keys — never by a free-text field the reviewer fills in. Treat an empty re-run set as an error, never as zero blocking findings.