feat(P8): IHF Phase 8 complete — Federated Hub Maturity

Implements the final phase of the IHF v0.1 specification:

- WidgetOwnership: delegated ownership registry (local/delegated/global),
  append-only audit artefacts, ownership badge on widget show page
- HubRoutingRule + RoutingEngine: priority-ordered inter-hub routing engine;
  null-inclusive category/widget-type matching; RouteNowAction for manual
  re-evaluation; RoutedCandidates view per hub
- FederatedPolicyOverlay: draft → active → retired lifecycle; activated
  overlays are immutable (same pattern as Phase 6 contracts); policy
  compliance dashboard with decision coverage metrics
- StewardshipRole: named governance roles per hub; point-in-time revocation
  pattern; hub and ops-board integration
- ArchiveRecord + is_archived: soft-delete on widgets; lineage inspector
  traces full traceability chain (Widget → Events → Annotations → Candidates
  → Requirements → Decisions → Deployments → Signals + ArchiveRecord)
- FederatedGovernanceDashboard: 5-panel autoRefresh org-wide governance view
  (ownership coverage, routing activity, policy compliance, stewardship
  coverage, archive activity)

Schema: widget_ownerships, hub_routing_rules, federated_policy_overlays,
stewardship_roles, archive_records; ALTER widgets ADD is_archived;
ALTER requirement_candidates ADD routed_to_hub_id

Migration: 1743638400-ihf-phase8-federated-hub-maturity.sql
Tests: Phase 8 integration tests appended to Test/Integration.hs
Docs: docs/phase8-summary.md; SCOPE.md updated to Phase 8 complete

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

Web/FrontController.hs

@@ -24,6 +24,12 @@ import Web.Controller.EnvelopeEmissionContracts ()
 import Web.Controller.InteractionReportingContracts ()
 import Web.Controller.WidgetAdapterSpecs ()
 import Web.Controller.CrossHubPropagations ()
+import Web.Controller.WidgetOwnerships ()
+import Web.Controller.HubRoutingRules ()
+import Web.Controller.FederatedPolicyOverlays ()
+import Web.Controller.StewardshipRoles ()
+import Web.Controller.ArchiveRecords ()
+import Web.Controller.FederatedGovernance ()
 import Web.Controller.Sessions ()
 
 instance FrontController WebApplication where
@@ -44,6 +50,12 @@ instance FrontController WebApplication where
         , parseRoute @InteractionReportingContractsController
         , parseRoute @WidgetAdapterSpecsController
         , parseRoute @CrossHubPropagationsController
+        , parseRoute @WidgetOwnershipsController
+        , parseRoute @HubRoutingRulesController
+        , parseRoute @FederatedPolicyOverlaysController
+        , parseRoute @StewardshipRolesController
+        , parseRoute @ArchiveRecordsController
+        , parseRoute @FederatedGovernanceController
         ]
 
 instance InitControllerContext WebApplication where
@@ -85,6 +97,9 @@ defaultLayout inner = [hsx|
                 <a href={WidgetAdapterSpecsAction} class="text-sm text-gray-600 hover:text-gray-900">Adapters</a>
                 <a href={CrossHubPropagationsAction} class="text-sm text-gray-600 hover:text-gray-900">Propagations</a>
                 <a href={OperationalReviewBoardAction} class="text-sm text-gray-600 hover:text-gray-900">Ops Review</a>
+                <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>
                 <div class="ml-auto">
                     <a href={DeleteSessionAction} class="text-sm text-gray-500 hover:text-gray-700">Sign out</a>
                 </div>