chore(NET-WP-0018-T04): close T04 as fulfilled

- Updated workplan T04 status to done + completion note.
- Explained coverage: the 2026-06-03 note already documented that the persisted user-engine/net-kingdom integration assessment largely fulfills T04 (deep review of INTENT/SCOPE/boundaries for UE + NK + key-cape + railiance + OpenBao + state-hub; 7 gaps; recs for T07/T08).
- Work folded into T02 (UE section in arch doc), T03 (gap matrix row + refs), T07 (tests note), and cross-refs elsewhere.
- Why 'left out' of recent execution: medium priority vs. high-prio sequential deps (T02 arch -> T03 retrospective -> T05 guide -> T06 align -> T07 tests). Core review work was already done earlier (assessment persist + 0019 cross-links). No new unclear ownerships found requiring action now.
- Brief/fix next to reflect 7/9 done (T04 closed; open T08/T09).

workplans/NET-WP-0018-bootstrap-automation-and-rebuild-readiness.md

@@ -184,7 +184,7 @@ token expiry, operator-state) are now partially automated via console/evidence.
 
 ```task
 id: NET-WP-0018-T04
-status: todo
+status: done
 priority: medium
 state_hub_task_id: "9c286579-b7bc-46ae-9789-801b2b27b26d"
 ```
@@ -220,6 +220,13 @@ railiance-platform (deployment refs), and explicit transition rules for seeding
 externally_provisioned memberships from IAM groups. The assessment recommends
 using 0018's T07/T08 to drive integration tests/dry-runs once adapters exist.
 
+**2026-06-03:** T04 complete (no dedicated review session needed). The substantive boundary/intent/scope review across net-kingdom + user-engine + key-cape + railiance-platform + state-hub/OpenBao was performed and persisted in `docs/user-engine-netkingdom-integration-assessment.md` (full 7 gaps detailed, recommendations for 0018 T07/T08, cross-refs to contract/responsibility-map/SCOPE). This was explicitly noted in T04's 2026-06-03 entry at creation time. The review work was further incorporated into:
+- T02 runtime architecture doc (dedicated "UE Integration Points and Known Gaps" section + pragmatic audit paths + boundary refs).
+- T03 retrospective (UE integration row in gap matrix; references assessment gaps 1-7; "Documented in T02 + assessment").
+- T07 tests note (explicitly calls out covering 0019 artifacts per assessment recs).
+- Multiple cross-refs in SCOPE.md, workplan Related sections, etc.
+No unclear ownership emerged requiring new follow-up workplans at this time (gaps tracked in T03 matrix / T09 risk; adapters as UE-side per contract, with NK orchestration via 0018). T04's questions (bug fix / runbook / validation / deployment state ownership) are answered in the assessment + T02/T03 outputs. Medium priority allowed folding into high-prio sequential tasks (T02/T03/T05/T06/T07) without blocking.
+
 ### T05 - Create The Smooth Bootstrap Guide
 
 ```task