test_ladder_reruns_do_not_spend_extra_repeat_budget only exercised the
finish and crash tails, so the dead-worker recovery fix in
scheduler_worker_failure and the ownership-lost fix had no test that fails
without them. Add "worker" (record_unknown_worker_outcome on an unknown
execution) and "ownership_lost" (transport-cancelled rung recorded as
interrupted) rows; each asserts repeat.completed stays at 1. Both rows fail
against the pre-fix source.