feat(ADM-018): completed feature

work/artifacts/F-026/implementer.md

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+# Implementer — F-026 CMS module
+
+## Summary
+Implemented simple CMS module with slug-based public pages and draft/publish states. Slug uniqueness enforced at DB level. Admin operations require admin role.
+
+## Files changed
+- `project/migrations/020_cms.js`
+- `project/src/modules/cms/**`
+- `project/src/app/build-app.ts`
+
+## Acceptance evidence
+- AC1 published page: `cms-service.test.ts` returns page for published status.
+- AC2 draft page: same test rejects with `PageNotPublishedError`.
+- AC3 duplicate slug: schema enforces UNIQUE (slug); repository uses ON CONFLICT DO NOTHING and service throws DuplicateSlugError.
+
+## Commands run
+- `cd project && npm run lint/typecheck/build/test` passed
+- `cd project && TEST_DATABASE_URL='postgres://mdv:mdv_dev_only@localhost:5432/mdv_test' npm run test:integration -- migrations.itest` passed; 14 files, 53 tests
+- `./scripts/verify.sh` passed
+
+## Notes
+- Slugs restricted to kebab-case via zod regex.
+- Public store front consumption is out of scope for this slice; service exposes `getPublicPageBySlug` which throws when status is not 'published'.