CUST-WP-0058: closeout — finished and archived

All 8 tasks done. Handoffs delivered to fin-hub, core-hub,
vergabe-teilnahme, ops-hub, railiance-apps (backup HIGH), NetKingdom.
coulomb.social rebuild seeded (docs/coulomb-social-rebuild-seed.md).
SCOPE.md Current State updated.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

SCOPE.md

@@ -90,6 +90,15 @@ their own repositories and are referenced here only as integration pointers.
 - Status: **stable maintenance** — governance substrate in daily ecosystem use.
   No `active`/`ready`/`blocked` CUST-WP workplans; one `proposed` plan
   (`CUST-WP-0055` terminology refactor) awaits review before pickup.
+- Business platform enablement (`CUST-WP-0058`, finished 2026-07-10):
+  DR-1/2/3 resolved (instance-per-client tenancy; coulomb.social as
+  standalone app; app-local identity), business-app service contract
+  accepted (`canon/standards/business-app-service-contract_v0.1.md`),
+  client-hub scoped, delivery lane validated (vergabe-teilnahme conformance
+  snapshot). Open cross-repo handoffs: cnpg backups (railiance-apps,
+  **HIGH**), tenant keying + runbook (vergabe-teilnahme), FIN-WP-0002
+  (fin-hub), CLNT-WP-0001 (core-hub), coulomb.social rebuild seed
+  (`docs/coulomb-social-rebuild-seed.md`).
 - Recent closeouts (archived 2026-07-08): `CUST-WP-0025` FOS hub bootstrap
   (identity, hub-core extraction, Core Hub ops lane, fin-hub MVP);
   `CUST-WP-0054` workstation independence; `CUST-WP-0051` infrastructure