S00-003: Record blocked task and remediation handoff

Changes: Preserve incomplete work and blocker metadata for S00-003. This checkpoint does not mark implementation accepted.
Validation: Session ended with status blocked.
Blocker: 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.

Task: S00-003
Agent: auto-protocol-826aa6bc12ef
Role: protocol
Action: claim
Status: blocked

Task title: Проверить XMPP WSS/auth библиотеку

experiments/0002-xmpp-library/package.json

@@ -0,0 +1,10 @@
+{
+  "name": "luma-xmpp-library-spike",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "engines": {"node": "24.21.0", "npm": "11.19.0"},
+  "packageManager": "npm@11.19.0",
+  "scripts": {"test": "node --test test/*.test.mjs"},
+  "dependencies": {"stanza": "12.22.1"}
+}