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>

workplans/IHUB-WP-0008-ihf-phase8-federated-hub-maturity.md

@@ -4,7 +4,7 @@ type: workplan
 title: "IHF Phase 8 — Federated Hub Maturity"
 domain: inter_hub
 repo: inter-hub
-status: todo
+status: done
 owner: custodian
 topic_slug: inter_hub
 created: "2026-03-29"
@@ -62,7 +62,7 @@ Reference: `specs/InteractionHubFrameworkSpecification_v0.1.md` §Phase 8,
 
 ```task
 id: IHUB-WP-0008-T01
-status: todo
+status: done
 priority: high
 state_hub_task_id: "5c5315b7-98ff-45dc-8eef-a5df83e18ea2"
 ```
@@ -184,7 +184,7 @@ CREATE INDEX widgets_is_archived_idx ON widgets (is_archived)
 
 ```task
 id: IHUB-WP-0008-T02
-status: todo
+status: done
 priority: high
 state_hub_task_id: "4d12c8e2-7b8a-4da7-a37d-0663453a3e43"
 ```
@@ -216,7 +216,7 @@ renders the badge; hub show page lists owned/stewarded widgets.
 
 ```task
 id: IHUB-WP-0008-T03
-status: todo
+status: done
 priority: high
 state_hub_task_id: "54597bea-bd1f-41ab-bb50-f2f19dc45c01"
 ```
@@ -253,7 +253,7 @@ receives `routed_to_hub_id`; `RoutedCandidatesAction` shows it; manual
 
 ```task
 id: IHUB-WP-0008-T04
-status: todo
+status: done
 priority: high
 state_hub_task_id: "df2fcdb1-657f-49d1-b340-79d4f55a9088"
 ```
@@ -286,7 +286,7 @@ overlays.
 
 ```task
 id: IHUB-WP-0008-T05
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "490f37e1-44b2-4667-8213-4498121aaa55"
 ```
@@ -316,7 +316,7 @@ stewards; decision show page shows contextual stewards; ops board panel renders.
 
 ```task
 id: IHUB-WP-0008-T06
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "4b59d882-b690-4e14-8460-614bd114ce7a"
 ```
@@ -347,7 +347,7 @@ flag filters it from active queries; lineage inspector renders the full chain.
 
 ```task
 id: IHUB-WP-0008-T07
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "0c2f6b98-41a5-4876-8bcc-07af08acaf77"
 ```
@@ -375,7 +375,7 @@ all counts are correct against test fixtures.
 
 ```task
 id: IHUB-WP-0008-T08
-status: todo
+status: done
 priority: high
 state_hub_task_id: "422cae8f-5dc6-4393-b78a-77169b00da8a"
 ```