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.

docs/integrations/customer-engagement-playbook.md

@@ -1,7 +1,7 @@
 # Customer Engagement Playbook v1 (supplier)
 
 How kaizen-agentic supports a **customer engagement repo** (reference:
-[coulomb-loop](https://gitea.example/coulomb/coulomb-loop)). Second engagements
+[coulomb-loop](https://gitea.coulomb.social/coulomb/coulomb-loop)). Second engagements
 should copy [customer-engagement-repo-layout.md](customer-engagement-repo-layout.md)
 and complete the checklist in one session.
 
@@ -74,7 +74,7 @@ kaizen-agentic schedule init --engagement <slug> --bootstrap-cadence weekly --fo
 
 ## Reference implementation
 
-- Customer: [coulomb-loop INTENT](https://gitea.example/coulomb/coulomb-loop/blob/main/INTENT.md)
+- Customer: [coulomb-loop INTENT](https://gitea.coulomb.social/coulomb/coulomb-loop/src/branch/main/INTENT.md)
 - Supplier workplan: [KAIZEN-WP-0008](../../workplans/kaizen-agentic-WP-0008-coulomb-loop-supplier-engagement.md)
 - Convention: [ADR-006](../adr/ADR-006-customer-engagement-convention.md)
 

docs/integrations/customer-engagement-repo-layout.md

@@ -2,7 +2,7 @@
 
 Contract for a **customer engagement repository** that orchestrates kaizen
 improvement loops across a fleet roster. Reference implementation:
-[coulomb-loop](https://gitea.example/coulomb/coulomb-loop) (`coulomb_social` domain).
+[coulomb-loop](https://gitea.coulomb.social/coulomb/coulomb-loop) (`coulomb_social` domain).
 
 Supplier agents and CLI live in `kaizen-agentic`. Runtime `.kaizen/` state lives
 in **target repos**, not in the customer repo.