S00-014: Approve runner cleanup idempotence after independent lifecycle checks

Changes: Accept the bounded S00-014 cleanup correction and record independent QA evidence and handoff; no reviewer source changes.
Validation: Four focused signal/descendant tests and make check passed (72 tests); prior function independently fails the injected repeated-signal regression in memory. Inspected executor patch/message and scope; git diff --check passed. Natural EPERM, Windows and parent-task acceptance are not claimed.

Task: S00-014
Agent: auto-qa-0c2d58e2382e
Role: qa
Action: review
Status: done

Task title: Fix repeated runner cleanup after a submitted parent is reaped

planning/stages/S00.md

@@ -16,9 +16,9 @@
 - [S00-008](../tasks/S00-008.md): Описать WSS/upload/TURN/push topology — ci-cd; todo.
 - [S00-009](../tasks/S00-009.md): Согласовать результаты spikes — orchestrator; todo.
 - [S00-011](../tasks/S00-011.md): Restore verified npm registry access for the stack spike — ci-cd; done.
-- [S00-012](../tasks/S00-012.md): Fix runner prompt delivery after partial stdin timeout — ci-cd; blocked.
+- [S00-012](../tasks/S00-012.md): Fix runner prompt delivery after partial stdin timeout — ci-cd; todo.
 - [S00-013](../tasks/S00-013.md): Bound oversized S21-006 runner context without truncating requirements — ci-cd; done.
-- [S00-014](../tasks/S00-014.md): Fix repeated runner cleanup after a submitted parent is reaped — ci-cd; review.
+- [S00-014](../tasks/S00-014.md): Fix repeated runner cleanup after a submitted parent is reaped — ci-cd; done.
 - [S00-010](../tasks/S00-010.md): Gate: Профиль и проверка стека — qa; todo.
 
 ## Граница этапа