complete_task and request_review return bare False when the dependency
gate refuses, and _patch_status only enriched the 409 for status=ready,
so PATCH status=done/review on a gated card answered "not valid from
current state" and the bulk entry said "transition refused". Consult
unsatisfied_parents on a refused done/review and name the parents in
the 409 detail and the bulk entry error, matching the CLI/tool wording.
06350c79d5