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/View/EnvelopeEmissionContracts/Show.hs

@@ -25,6 +25,7 @@ instance View ShowView where
             <span class={adapterStatusBadge contract.status <> " text-xs px-2 py-0.5 rounded font-medium"}>
                 {contract.status}
             </span>
+            {maturityBadge contract.maturity}
         </div>
 
         {forEach (contractDescription contract) (\d -> [hsx|
@@ -57,3 +58,10 @@ contractDescription :: EnvelopeEmissionContract -> [Text]
 contractDescription c = case c.description of
     Just d  -> [d]
     Nothing -> []
+
+maturityBadge :: Text -> Html
+maturityBadge "stable"       = [hsx|<span class="px-2 py-0.5 rounded text-xs bg-green-100 text-green-800 font-medium">Stable</span>|]
+maturityBadge "beta"         = [hsx|<span class="px-2 py-0.5 rounded text-xs bg-blue-100 text-blue-800 font-medium">Beta</span>|]
+maturityBadge "experimental" = [hsx|<span class="px-2 py-0.5 rounded text-xs bg-amber-100 text-amber-800 font-medium">Experimental</span>|]
+maturityBadge "deprecated"   = [hsx|<span class="px-2 py-0.5 rounded text-xs bg-gray-100 text-gray-500 font-medium">Deprecated</span>|]
+maturityBadge m              = [hsx|<span class="px-2 py-0.5 rounded text-xs bg-gray-100 text-gray-600 font-medium">{m}</span>|]