test: add invalid AI email attempt fixture

Author: LalaSkye

docs/enterprise-shaped-scenarios/invalid_attempt_missing_authority.json

@@ -0,0 +1,14 @@
+{
+  "scenario_id": "ESP-001",
+  "attempt_id": "ATT-ESP-001-INVALID-001",
+  "actor": "agent://morpheus-draft-bot-v1",
+  "action_type": "SEND_EXTERNAL_EMAIL",
+  "recipient_scope": "external:partner-domain.com",
+  "payload": {
+    "subject": "Synthetic external message",
+    "body": "This is a synthetic test payload. It must not be sent."
+  },
+  "payload_hash": "sha256:a3f8c2d1e7b904561ac38fd2e190bba47c2d3f8a1e056b7c9d4e2f1a8b3c7d90",
+  "expiry": "2026-05-12T11:00:00Z",
+  "nonce": "nonce-esp-001-001"
+}