chore: close KAIZEN-WP-0008 — fix gitea links and sync brief

Replace placeholder gitea.example URLs with gitea.coulomb.social in
engagement docs; apply fix-consistency brief writeback.

.custodian-brief.md

@@ -2,21 +2,12 @@
 # Custodian Brief — kaizen-agentic
 
 **Domain:** custodian
-**Last synced:** 2026-06-18 08:54 UTC
+**Last synced:** 2026-06-18 09:03 UTC
 **State Hub:** http://127.0.0.1:8000 *(adjust if running on a remote machine)*
 
 ## Active Workstreams
 
-### Coulomb-loop supplier engagement (customer-repo playbook)
-Progress: 4/10 done  |  workstream_id: `80f473eb-d052-4f50-a633-806f03c469be`
-
-**Open tasks:**
-- · Document customer engagement repo layout  `177bb16c`
-- · ADR-006 customer engagement convention  `5c06cdd9`
-- · Tests  `f45077ea`
-- · Absorb supplier-notes into playbook v1  `0ef49fb5`
-- · ActivityDefinition override manifest  `c9bee570`
-- · Documentation release  `052a592b`
+*(none — repo may need first-session setup)*
 
 ---
 ## MCP Orientation (when available)