delegate-claim-parent-terminal

# Claimed Child Writes Fail after Parent Completion

Claim-id targeted write commands fail closed when their parent runbook has
already reached a terminal lifecycle. The refusal is `DELEGATION_SUPERSEDED`
(RD-825), naming `parent-ended` as the cause: the parent-side latch tombstoned
the bearer when the parent terminalized, and a tombstoned bearer is superseded,
not unknown. Reporting it as a claim that does not exist would read as a
mistyped id and invite a retry that can never succeed.

## 1. Delegated child

- DELEGATE
- PASS ALL COMPLETE
- FAIL ANY STOP

### 1.1 Child task

- delegation-child-manual-three-step.runbook.md