S00-004: Record blocked task and remediation handoff

Changes: Preserve incomplete work and blocker metadata for S00-004. This checkpoint does not mark implementation accepted.
Validation: Session ended with status blocked.
Blocker: Agent timed out; process terminated before escalation

Task: S00-004
Agent: auto-crypto-8bf3dcf711b9
Role: crypto
Action: claim
Status: blocked

Task title: Проверить browser OMEMO backend

state/tasks.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "revision": 55,
+  "revision": 57,
   "tasks": {
     "S00-001": {
       "status": "done",
@@ -47,8 +47,17 @@
       "resumed_after_blocker": true
     },
     "S00-004": {
-      "status": "todo",
-      "owner": null
+      "status": "blocked",
+      "owner": "auto-crypto-8bf3dcf711b9",
+      "started_at": "2026-10-15T08:02:39+00:00",
+      "reason": "Agent timed out; process terminated before escalation",
+      "updated_at": "2026-10-15T08:32:40+00:00",
+      "blocked_by": [
+        "S00-021"
+      ],
+      "resume_status": "in_progress",
+      "blocker_report": "state/blockers/S00-021.md",
+      "handoff": "state/handoffs/S00-004.md"
     },
     "S00-005": {
       "status": "todo",
@@ -1268,6 +1277,12 @@
       "reason": null,
       "started_at": "2026-10-15T07:27:20+00:00",
       "updated_at": "2026-10-15T07:27:20+00:00"
+    },
+    "S00-021": {
+      "status": "todo",
+      "owner": null,
+      "external_wait": false,
+      "reason": null
     }
   },
   "events": [
@@ -1979,6 +1994,29 @@
       "from": "todo",
       "to": "in_progress",
       "reason": null
+    },
+    {
+      "revision": 56,
+      "at": "2026-10-15T08:02:39+00:00",
+      "action": "claim",
+      "task": "S00-004",
+      "agent": "auto-crypto-8bf3dcf711b9",
+      "role": "crypto",
+      "from": "todo",
+      "to": "in_progress",
+      "reason": null
+    },
+    {
+      "revision": 57,
+      "at": "2026-10-15T08:32:40+00:00",
+      "action": "escalate",
+      "task": "S00-004",
+      "resolution_task": "S00-021",
+      "agent": "auto-crypto-8bf3dcf711b9",
+      "role": "crypto",
+      "from": "in_progress",
+      "to": "blocked",
+      "reason": "Agent timed out; process terminated before escalation"
     }
   ],
   "retired_agents": [
@@ -1991,6 +2029,7 @@
     "auto-protocol-826aa6bc12ef",
     "auto-protocol-902594b44429",
     "auto-protocol-dcdf92cd067e",
-    "auto-protocol-59f4d359b339"
+    "auto-protocol-59f4d359b339",
+    "auto-crypto-8bf3dcf711b9"
   ]
 }