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/FederatedPolicyOverlays/PolicyComplianceDashboard.hs

@@ -0,0 +1,76 @@
+module Web.View.FederatedPolicyOverlays.PolicyComplianceDashboard where
+
+import Web.Types
+import Generated.Types
+import IHP.Prelude
+import IHP.ViewPrelude
+
+data PolicyComplianceDashboardView = PolicyComplianceDashboardView
+    { overlays  :: ![FederatedPolicyOverlay]
+    , hubs      :: ![Hub]
+    , decisions :: ![DecisionRecord]
+    , policies  :: ![PolicyReference]
+    }
+
+instance View PolicyComplianceDashboardView where
+    html PolicyComplianceDashboardView { .. } = [hsx|
+        <div class="flex items-center justify-between mb-6">
+            <h1 class="text-2xl font-semibold">Policy Compliance Dashboard</h1>
+            <a href={FederatedPolicyOverlaysAction}
+               class="text-sm text-gray-500 hover:underline">← All Policies</a>
+        </div>
+
+        {if null overlays
+            then [hsx|
+                <div class="bg-gray-50 rounded-lg border border-gray-200 p-8 text-center">
+                    <p class="text-gray-400 text-sm">No active policy overlays.</p>
+                </div>
+            |]
+            else [hsx|
+                <div class="space-y-4">
+                    {forEach overlays renderOverlayRow}
+                </div>
+            |]}
+
+        <div class="mt-8 bg-white rounded-lg border border-gray-200 p-6">
+            <h2 class="text-lg font-medium text-gray-800 mb-4">Overall Coverage</h2>
+            <div class="flex items-center gap-6">
+                <div class="text-center">
+                    <div class="text-3xl font-bold text-gray-900">{show totalDecisions}</div>
+                    <div class="text-xs text-gray-500 mt-1">Total Decisions</div>
+                </div>
+                <div class="text-center">
+                    <div class="text-3xl font-bold text-green-600">{show coveredDecisions}</div>
+                    <div class="text-xs text-gray-500 mt-1">With Policy Ref</div>
+                </div>
+                <div class="text-center">
+                    <div class="text-3xl font-bold text-indigo-600">{coveragePct}%</div>
+                    <div class="text-xs text-gray-500 mt-1">Coverage</div>
+                </div>
+            </div>
+        </div>
+    |]
+      where
+        decisionIdsWithPolicy = map (.requirementId) policies |> catMaybes |> map show
+        coveredDecisions = length $ filter (\d -> show d.id `elem` decisionIdsWithPolicy) decisions
+        totalDecisions   = length decisions
+        coveragePct :: Int
+        coveragePct = if totalDecisions == 0 then 0
+                      else (coveredDecisions * 100) `div` totalDecisions
+
+        renderOverlayRow :: FederatedPolicyOverlay -> Html
+        renderOverlayRow o = [hsx|
+            <div class="bg-white rounded-lg border border-gray-200 p-5">
+                <div class="flex items-start justify-between">
+                    <div>
+                        <h3 class="font-medium text-gray-800">{o.title}</h3>
+                        <p class="text-xs text-gray-500 mt-1">
+                            Enforced from: {maybe "–" show o.enforcedFrom}
+                        </p>
+                    </div>
+                    <span class="text-xs bg-green-100 text-green-700 px-2 py-0.5 rounded font-medium">
+                        active
+                    </span>
+                </div>
+            </div>
+            |]