S00-012: Verify runner prompt delivery and lifecycle regressions

Changes: Record verification evidence and replace the blocked S00-012 handoff with independent QA review instructions. Retain the existing stdin implementation and regressions from prior checkpoints; no new source changes.
Validation: Reproduced the legacy partial stdin timeout on Python 3.9.6 and reaped the child. All 28 automation tests passed, including exact 140024-byte UTF-8/EOF and timeout/submit descendant cleanup. make check passed all 72 tests; git diff --check passed. No live model, application readiness or Windows cleanup check is claimed.

Task: S00-012
Agent: auto-ci-cd-f101e40d9902
Role: ci-cd
Action: claim
Status: review

Task title: Fix runner prompt delivery after partial stdin timeout

state/tasks.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "revision": 22,
+  "revision": 24,
   "tasks": {
     "S00-001": {
       "status": "done",
@@ -1136,18 +1136,19 @@
       "completed_at": "2026-10-14T18:11:33+00:00"
     },
     "S00-012": {
-      "status": "todo",
-      "owner": null,
+      "status": "review",
+      "owner": "auto-ci-cd-f101e40d9902",
       "external_wait": false,
       "reason": null,
-      "started_at": "2026-10-14T18:42:03+00:00",
-      "updated_at": "2026-10-14T18:48:36+00:00",
+      "started_at": "2026-10-14T18:48:36+00:00",
+      "updated_at": "2026-10-14T18:50:52+00:00",
       "blocked_by": [],
       "resume_status": "in_progress",
       "blocker_report": "state/blockers/S00-014.md",
       "handoff": "state/handoffs/S00-012.md",
       "previous_owner": "auto-ci-cd-28868645424b",
-      "resumed_after_blocker": true
+      "resumed_after_blocker": true,
+      "evidence": "state/evidence/S00-012-auto-ci-cd-f101e40d9902.md"
     },
     "S00-013": {
       "status": "done",
@@ -1455,6 +1456,29 @@
       "to": "done",
       "reason": null,
       "evidence": "state/evidence/S00-014-review.md"
+    },
+    {
+      "revision": 23,
+      "at": "2026-10-14T18:48:36+00:00",
+      "action": "claim",
+      "task": "S00-012",
+      "agent": "auto-ci-cd-f101e40d9902",
+      "role": "ci-cd",
+      "from": "todo",
+      "to": "in_progress",
+      "reason": null
+    },
+    {
+      "revision": 24,
+      "at": "2026-10-14T18:50:52+00:00",
+      "action": "submit",
+      "task": "S00-012",
+      "agent": "auto-ci-cd-f101e40d9902",
+      "role": null,
+      "from": "in_progress",
+      "to": "review",
+      "reason": null,
+      "evidence": "state/evidence/S00-012-auto-ci-cd-f101e40d9902.md"
     }
   ],
   "retired_agents": [