test(crud): finalize MVP1 gate CRUD contract coverage

docs/product-engineering/crud-baseline.md

@@ -7,6 +7,8 @@ MVP0 now includes a shared CRUD foundation package: `@cms/crud`.
 Current baseline:
 
 - Shared service factory: `createCrudService`
+- Repository contract: `list`, `findById`, `create`, `update`, `delete`
+- Service surface for list/detail/editor flows: `list`, `getById`, `create`, `update`, `delete`
 - Shared validation error type: `CrudValidationError`
 - Shared not-found error type: `CrudNotFoundError`
 - Shared mutation audit hook contract: `CrudAuditHook`
@@ -24,6 +26,11 @@ Current baseline:
 - `registerPostCrudAuditHook`
 
 Validation for create/update is enforced by `@cms/content` schemas.
+Contract tests validate:
+
+- repository list/detail behavior via CRUD service
+- validation and not-found errors
+- audit payload propagation (`actor`, `metadata`)
 
 The admin dashboard currently includes a temporary posts CRUD sandbox to validate this flow through a real app UI.