S00-017: Approve fail-closed SCRAM validation after independent integration checks

Changes: Accept the bounded S00-017 fixture experiment and ADR; record independent security review and handoff with remaining browser, WSS, mechanism-policy and timing limits.
Validation: Fresh-cache npm ci and npm test passed on Node 24.21.0/npm 11.19.0 with 44 integrated tests. Verify exact installed pins, eight MIT notices, HTTPS/integrity and unchanged vendor files. make check passed 72 tooling tests; inspect executor scope/message and review metadata whitespace. No browser/server interoperability or constant-time assurance claimed.

Task: S00-017
Agent: auto-security-9ab954f6e021
Role: security
Action: review
Status: done

Task title: Establish fail-closed SCRAM server-final validation

state/tasks.json

@@ -1,6 +1,6 @@
 {
   "schema_version": 1,
-  "revision": 40,
+  "revision": 41,
   "tasks": {
     "S00-001": {
       "status": "done",
@@ -32,17 +32,17 @@
       "completed_at": "2026-10-14T19:06:23+00:00"
     },
     "S00-003": {
-      "status": "blocked",
-      "owner": "auto-protocol-826aa6bc12ef",
+      "status": "todo",
+      "owner": null,
       "started_at": "2026-10-14T19:06:24+00:00",
-      "reason": "StanzaJS 12.22.1 SASL feature accepts missing/forged server-final without processSuccess/finalize, including success before challenge/proof. Safe SCRAM cannot be attested by S00-003 until this authentication boundary has a reviewed solution.",
-      "updated_at": "2026-10-14T19:09:23+00:00",
-      "blocked_by": [
-        "S00-017"
-      ],
+      "reason": null,
+      "updated_at": "2026-10-14T19:20:57+00:00",
+      "blocked_by": [],
       "resume_status": "in_progress",
       "blocker_report": "state/blockers/S00-017.md",
-      "handoff": "state/handoffs/S00-003.md"
+      "handoff": "state/handoffs/S00-003.md",
+      "previous_owner": "auto-protocol-826aa6bc12ef",
+      "resumed_after_blocker": true
     },
     "S00-004": {
       "status": "todo",
@@ -1221,14 +1221,17 @@
       "completed_at": "2026-10-14T18:58:04+00:00"
     },
     "S00-017": {
-      "status": "review",
+      "status": "done",
       "owner": "auto-protocol-599343cd9e3f",
       "external_wait": false,
       "reason": null,
       "started_at": "2026-10-14T19:09:24+00:00",
-      "updated_at": "2026-10-14T19:17:46+00:00",
+      "updated_at": "2026-10-14T19:20:57+00:00",
       "evidence": "state/evidence/S00-017-auto-protocol-599343cd9e3f.md",
-      "handoff": "state/handoffs/S00-017.md"
+      "handoff": "state/handoffs/S00-017.md",
+      "reviewer": "auto-security-9ab954f6e021",
+      "review_evidence": "state/evidence/S00-017-review.md",
+      "completed_at": "2026-10-14T19:20:57+00:00"
     }
   },
   "events": [
@@ -1743,6 +1746,27 @@
       "to": "review",
       "reason": null,
       "evidence": "state/evidence/S00-017-auto-protocol-599343cd9e3f.md"
+    },
+    {
+      "revision": 41,
+      "at": "2026-10-14T19:20:57+00:00",
+      "action": "auto-unblock",
+      "task": "S00-003",
+      "resolved_by": "S00-017",
+      "to": "todo",
+      "fresh_agent_required": true
+    },
+    {
+      "revision": 41,
+      "at": "2026-10-14T19:20:57+00:00",
+      "action": "approve",
+      "task": "S00-017",
+      "agent": "auto-security-9ab954f6e021",
+      "role": "security",
+      "from": "review",
+      "to": "done",
+      "reason": null,
+      "evidence": "state/evidence/S00-017-review.md"
     }
   ],
   "retired_agents": [