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

state/tasks.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "revision": 21,
+  "revision": 22,
   "tasks": {
     "S00-001": {
       "status": "done",
@@ -1136,19 +1136,17 @@
       "completed_at": "2026-10-14T18:11:33+00:00"
     },
     "S00-012": {
-      "status": "blocked",
-      "owner": "auto-ci-cd-28868645424b",
+      "status": "todo",
+      "owner": null,
       "external_wait": false,
-      "reason": "Submit-transition descendant regression fails: repeated stop_process_tree after parent reap raises EPERM at os.killpg; launch OSError handling then attempts invalid escalation from review state.",
+      "reason": null,
       "started_at": "2026-10-14T18:42:03+00:00",
-      "updated_at": "2026-10-14T18:45:16+00:00",
-      "blocked_by": [
-        "S00-014"
-      ],
+      "updated_at": "2026-10-14T18:48:36+00:00",
+      "blocked_by": [],
       "resume_status": "in_progress",
       "blocker_report": "state/blockers/S00-014.md",
       "handoff": "state/handoffs/S00-012.md",
-      "previous_owner": "manual-ci-cd-stdin-20261015b",
+      "previous_owner": "auto-ci-cd-28868645424b",
       "resumed_after_blocker": true
     },
     "S00-013": {
@@ -1165,14 +1163,17 @@
       "completed_at": "2026-10-14T18:42:03+00:00"
     },
     "S00-014": {
-      "status": "review",
+      "status": "done",
       "owner": "auto-ci-cd-14343249da62",
       "external_wait": false,
       "reason": null,
       "started_at": "2026-10-14T18:45:17+00:00",
-      "updated_at": "2026-10-14T18:47:20+00:00",
+      "updated_at": "2026-10-14T18:48:36+00:00",
       "evidence": "state/evidence/S00-014-auto-ci-cd-14343249da62.md",
-      "handoff": "state/handoffs/S00-014.md"
+      "handoff": "state/handoffs/S00-014.md",
+      "reviewer": "auto-qa-0c2d58e2382e",
+      "review_evidence": "state/evidence/S00-014-review.md",
+      "completed_at": "2026-10-14T18:48:36+00:00"
     }
   },
   "events": [
@@ -1433,6 +1434,27 @@
       "to": "review",
       "reason": null,
       "evidence": "state/evidence/S00-014-auto-ci-cd-14343249da62.md"
+    },
+    {
+      "revision": 22,
+      "at": "2026-10-14T18:48:36+00:00",
+      "action": "auto-unblock",
+      "task": "S00-012",
+      "resolved_by": "S00-014",
+      "to": "todo",
+      "fresh_agent_required": true
+    },
+    {
+      "revision": 22,
+      "at": "2026-10-14T18:48:36+00:00",
+      "action": "approve",
+      "task": "S00-014",
+      "agent": "auto-qa-0c2d58e2382e",
+      "role": "qa",
+      "from": "review",
+      "to": "done",
+      "reason": null,
+      "evidence": "state/evidence/S00-014-review.md"
     }
   ],
   "retired_agents": [