Implement REUSE-WP-0012 federation scale and intent alignment

Add hub sync and report cohorts CLI commands with pytest coverage, document
sibling index publish contract and hub hardening path, align INTENT layout,
raise external evidence on three registry entries, and close gap priorities
19-23 (priority 18 deferred on sibling index blocks).

registry/capabilities/capability.registry.register.md

@@ -47,14 +47,19 @@ external_evidence:
       - hosting registered capabilities
       - enforcing implementation architecture
   reliability:
-    level: R2
-    name: Tolerable
+    level: R3
+    name: Usable
     confidence: medium
     basis: consumer_quality_signals
     known_reliability_risks:
       - index drift still possible if authors skip validate
       - CLI requires local venv install
-      - schema ID pattern required a fix during WP-0003 dogfooding
+      - sibling repos cannot register until indexes publish raw URLs
+    evidence:
+      satisfied_signals:
+        - CI validate with fail-on-warnings on every push
+        - hub register/list/federated smoke on production reuse.coulomb.social
+        - pytest coverage for hub API and federation compose paths
 
 discovery:
   intent: >
@@ -112,7 +117,13 @@ evidence:
     - docs/deploy/reuse-kubernetes.md
   tests:
     - tests/test_hub.py
-  consumer_feedback: []
+    - tests/test_hub_sync.py
+    - .gitea/workflows/ci.yml
+  consumer_feedback:
+    - >
+        reuse-surface dogfood (REUSE-WP-0011): production hub registration and
+        /v1/federated compose succeeded on Railiance01 without write-path
+        regressions after WP-0011 deploy.
   bug_reports: []
   incidents: []
 
@@ -154,6 +165,14 @@ promotion_history:
       Hosted federation hub live at reuse.coulomb.social; hub register/update
       via HTTP API and reuse-surface hub CLI; production deploy on Railiance01.
     author: reuse-surface
+  - date: "2026-06-16"
+    dimension: reliability
+    from: R2
+    to: R3
+    rationale: >
+      CI gates, pytest hub/federation coverage, and production hub smoke support
+      normal registration workflows with documented limitations.
+    author: reuse-surface
 ---
 
 # Capability Registration