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/View/HubRoutingRules/RoutedCandidates.hs

@@ -0,0 +1,63 @@
+module Web.View.HubRoutingRules.RoutedCandidates where
+
+import Web.Types
+import Generated.Types
+import IHP.Prelude
+import IHP.ViewPrelude
+
+data RoutedCandidatesView = RoutedCandidatesView
+    { hub        :: !Hub
+    , candidates :: ![RequirementCandidate]
+    }
+
+instance View RoutedCandidatesView where
+    html RoutedCandidatesView { .. } = [hsx|
+        <div class="flex items-center gap-3 mb-6">
+            <a href={HubRoutingRulesAction} class="text-sm text-gray-500 hover:underline">Routing Rules</a>
+            <span class="text-gray-300">/</span>
+            <h1 class="text-2xl font-semibold">Routed In: {hub.name}</h1>
+        </div>
+
+        <p class="text-sm text-gray-500 mb-4">
+            Requirement candidates routed to this hub from other hubs.
+        </p>
+
+        {if null candidates
+            then [hsx|<p class="text-sm text-gray-400">No candidates routed to this hub yet.</p>|]
+            else [hsx|
+                <div class="bg-white rounded-lg border border-gray-200 overflow-hidden">
+                    <table class="w-full text-sm">
+                        <thead class="bg-gray-50 border-b border-gray-200">
+                            <tr>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Summary</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Category</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Status</th>
+                                <th class="text-left px-4 py-3 font-medium text-gray-700">Created</th>
+                                <th class="px-4 py-3"></th>
+                            </tr>
+                        </thead>
+                        <tbody class="divide-y divide-gray-100">
+                            {forEach candidates renderRow}
+                        </tbody>
+                    </table>
+                </div>
+            |]}
+    |]
+      where
+        renderRow :: RequirementCandidate -> Html
+        renderRow c = [hsx|
+            <tr class="hover:bg-gray-50">
+                <td class="px-4 py-3 text-gray-800">{c.summary}</td>
+                <td class="px-4 py-3 text-gray-500">{c.category}</td>
+                <td class="px-4 py-3">
+                    <span class="text-xs bg-yellow-100 text-yellow-800 px-2 py-0.5 rounded font-medium">
+                        {c.status}
+                    </span>
+                </td>
+                <td class="px-4 py-3 text-xs text-gray-400">{show c.createdAt}</td>
+                <td class="px-4 py-3 text-right">
+                    <a href={ShowRequirementCandidateAction { requirementCandidateId = c.id }}
+                       class="text-xs text-blue-600 hover:underline">View</a>
+                </td>
+            </tr>
+            |]