feat(WP-0009): IHF GAAF Compliance Foundation — type registries, extension manifests, architectural contracts

Implements IHUB-WP-0009: closes four GAAF-2026 gaps before domain hub work begins.
- TypeRegistry helper + controllers/views (hub_kind, hub_capability_manifest)
- HubCapabilityManifest entity with validation and registry linkage
- ARCHITECTURE-LAYERS.md + CI-enforced boundary contracts
- Alembic migration 1743724800, fitness tests (Test/Architecture/)
- GAAF spec, Operational Architecture spec, domain hub extension guide
- Updates to CLAUDE.md, SCOPE.md, Schema.sql, Routes, FrontController, Types

state_hub_sync: pending (tunnel was STALE at completion time; run fix-consistency)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Web/FrontController.hs

@@ -30,6 +30,8 @@ import Web.Controller.FederatedPolicyOverlays ()
 import Web.Controller.StewardshipRoles ()
 import Web.Controller.ArchiveRecords ()
 import Web.Controller.FederatedGovernance ()
+import Web.Controller.TypeRegistries ()
+import Web.Controller.HubCapabilityManifests ()
 import Web.Controller.Sessions ()
 
 instance FrontController WebApplication where
@@ -56,6 +58,8 @@ instance FrontController WebApplication where
         , parseRoute @StewardshipRolesController
         , parseRoute @ArchiveRecordsController
         , parseRoute @FederatedGovernanceController
+        , parseRoute @TypeRegistriesController
+        , parseRoute @HubCapabilityManifestsController
         ]
 
 instance InitControllerContext WebApplication where
@@ -100,6 +104,8 @@ defaultLayout inner = [hsx|
                 <a href={FederatedGovernanceDashboardAction} class="text-sm text-gray-600 hover:text-gray-900">Federation</a>
                 <a href={FederatedPolicyOverlaysAction} class="text-sm text-gray-600 hover:text-gray-900">Policies</a>
                 <a href={ArchiveRecordsAction} class="text-sm text-gray-600 hover:text-gray-900">Archive</a>
+                <a href={WidgetTypeRegistryAction} class="text-sm text-gray-600 hover:text-gray-900">Registries</a>
+                <a href={HubCapabilityManifestsAction} class="text-sm text-gray-600 hover:text-gray-900">Extensions</a>
                 <div class="ml-auto">
                     <a href={DeleteSessionAction} class="text-sm text-gray-500 hover:text-gray-700">Sign out</a>
                 </div>