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/Controller/WidgetOwnerships.hs

@@ -0,0 +1,68 @@
+module Web.Controller.WidgetOwnerships where
+
+import Web.Types
+import Web.View.WidgetOwnerships.Index
+import Web.View.WidgetOwnerships.Show
+import Web.View.WidgetOwnerships.New
+import Web.View.WidgetOwnerships.Edit
+import Generated.Types
+import IHP.Prelude
+import IHP.ControllerPrelude
+
+instance Controller WidgetOwnershipsController where
+    beforeAction = ensureIsUser
+
+    action WidgetOwnershipsAction = do
+        ownerships <- query @WidgetOwnership |> orderByDesc #createdAt |> fetch
+        widgets    <- query @Widget |> fetch
+        hubs       <- query @Hub    |> fetch
+        render IndexView { ownerships, widgets, hubs }
+
+    action ShowWidgetOwnershipAction { widgetOwnershipId } = do
+        ownership <- fetch widgetOwnershipId
+        widget    <- fetch ownership.widgetId
+        ownerHub  <- fetch ownership.ownerHubId
+        mStewardHub <- case ownership.stewardHubId of
+            Nothing  -> pure Nothing
+            Just sid -> Just <$> fetch sid
+        render ShowView { ownership, widget, ownerHub, mStewardHub }
+
+    action NewWidgetOwnershipAction = do
+        let ownership = newRecord @WidgetOwnership
+        widgets <- query @Widget |> orderByAsc #name |> fetch
+        hubs    <- query @Hub    |> orderByAsc #name |> fetch
+        render NewView { ownership, widgets, hubs }
+
+    action CreateWidgetOwnershipAction = do
+        let ownership = newRecord @WidgetOwnership
+        widgets <- query @Widget |> orderByAsc #name |> fetch
+        hubs    <- query @Hub    |> orderByAsc #name |> fetch
+        ownership
+            |> fill @'["widgetId","ownerHubId","stewardHubId","ownershipType","effectiveFrom","effectiveUntil","notes"]
+            |> validateField #ownershipType (isInList ["local","delegated","global"])
+            |> ifValid \case
+                Left o  -> render NewView { ownership = o, widgets, hubs }
+                Right o -> do
+                    o <- createRecord o
+                    setSuccessMessage "Ownership assigned"
+                    redirectTo ShowWidgetOwnershipAction { widgetOwnershipId = o.id }
+
+    action EditWidgetOwnershipAction { widgetOwnershipId } = do
+        ownership <- fetch widgetOwnershipId
+        widgets <- query @Widget |> orderByAsc #name |> fetch
+        hubs    <- query @Hub    |> orderByAsc #name |> fetch
+        render EditView { ownership, widgets, hubs }
+
+    action UpdateWidgetOwnershipAction { widgetOwnershipId } = do
+        ownership <- fetch widgetOwnershipId
+        widgets <- query @Widget |> orderByAsc #name |> fetch
+        hubs    <- query @Hub    |> orderByAsc #name |> fetch
+        ownership
+            |> fill @'["stewardHubId","ownershipType","effectiveUntil","notes"]
+            |> validateField #ownershipType (isInList ["local","delegated","global"])
+            |> ifValid \case
+                Left o  -> render EditView { ownership = o, widgets, hubs }
+                Right o -> do
+                    updateRecord o
+                    setSuccessMessage "Ownership updated"
+                    redirectTo ShowWidgetOwnershipAction { widgetOwnershipId = o.id }