Normalize agent instructions and workplan frontmatter (STATE-WP-0067)

- Align agent files with on-disk workplan prefixes (infer from workplan ids)
- Set workplan domain to registered domain_slug; add topic_slug where applicable
- Repair frontmatter delimiter formatting; migrate legacy task status literals
- Regenerate AGENTS.md, CLAUDE.md, and .claude/rules from State Hub templates

workplans/CUST-WP-0000-state-hub-v0.1-build-deploy.md

@@ -2,7 +2,7 @@
 id: CUST-WP-0000
 type: workplan
 title: "State Hub v0.1 — Build & Deploy"
-domain: custodian
+domain: infotech
 repo: the-custodian
 status: completed
 owner: custodian
@@ -15,8 +15,7 @@ note: >
   Pre-ADR-001 record. This workstream was created DB-first during the first
   Custodian session (2026-02-24) before the workplan-as-repository-artefact
   convention was established. This file is a retroactive record written on
-  2026-03-11 to satisfy the ADR-001 consistency checker (C-08).
----
+  2026-03-11 to satisfy the ADR-001 consistency checker (C-08).---
 
 # State Hub v0.1 — Build & Deploy