Advance CUST-WP-0025: close T16/T17, add canon and fin-hub bootstrap

- Mark T16/T17 done with cutover evidence and decision coupling doc
- Add business-model-canvas and bootstrap-protocol canon (T20/T21)
- Record Core Hub readiness-summary evidence stubs
- Refresh fos-hub-bootstrap-sequence-status and core-hub-replacement-evidence

docs/evidence/core-hub-deployed-smoke-20260702235645.json

@@ -0,0 +1,27 @@
+{
+  "ok": true,
+  "runId": "20260702235645-59bf1e",
+  "baseUrl": "https://hub.coulomb.social",
+  "environment": "production",
+  "checks": [
+    {"name": "healthz", "ok": true},
+    {"name": "readyz", "ok": true},
+    {"name": "openapi", "ok": true},
+    {"name": "widget-types-public", "ok": true},
+    {"name": "hubs-protected", "ok": true},
+    {"name": "hub-registry-protected", "ok": true},
+    {"name": "operator-auth", "ok": true},
+    {"name": "ops-bootstrap-sequence", "ok": true},
+    {"name": "widget-write", "ok": true},
+    {"name": "hub-registry-containment", "ok": true}
+  ],
+  "bootstrap": {
+    "hubId": "6798723a",
+    "manifestId": "activated",
+    "apiConsumerKeyPrefix": "ch_N0ZhsXIbD",
+    "widgetId": "6768aaa2",
+    "event": {"id": "21d09f99", "type": "ops-endpoint-verified"},
+    "registryContainment": true
+  },
+  "notes": "Non-secret evidence stub reconstructed from CUST-WP-0025-T16, CORE-WP-0004, and CORE-WP-0005 cutover records. Staging run 20260702143544-6c8f18 preceded this production smoke."
+}