FLEX-WP-0035-T05: informed-decision lifecycle v2 declares application.access

- application.access allows only with purpose=readback and the authoring
  human bar; no workload path, no audience or client-scoped claims
- v1 operations unchanged; pin.json moves to v2; live pin stays v1 until T04
- examples/application-readback: readback catalogue with informed-decision's
  key-cape client binding; integration test over the shipped files

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 609675@bnt-lap001
Assistant-Session: 4987a36e-eb38-4b10-803c-15a29cd78212

examples/application-readback/registry_snapshot.json

@@ -0,0 +1,13 @@
+{
+  "systems": [
+    {
+      "id": "informed-decision",
+      "name": "Informed Decision",
+      "description": "Decision memos: authoring, collaboration and human review.",
+      "client_binding": {
+        "issuer": "https://kc.coulomb.social",
+        "client_id": "informed-decision-approver"
+      }
+    }
+  ]
+}