feat(ECR-026): OpsCMS ScheduledPublication 只读并 Closed

定时发布目录（ops_scheduled_publications），并加固 catalog 生成器。

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/CONTRACT_DIFF/ECR-026.yaml

@@ -0,0 +1,22 @@
+ecr: ECR-026
+capability: OpsCMS
+bounded_context: Ops_CMS_NoUGC
+parent: WAVE0-FROZEN
+predecessor: ECR-025
+change:
+  type: additive
+breaking_change: false
+migration_required: true
+compatibility_notes: >
+  Adds ScheduledPublication read catalog. Forbidden: UGC / real payment.
+
+apis:
+  - method: GET
+    path: /api/v1/admin/cms/publications
+    change: added
+  - method: GET
+    path: /api/v1/admin/cms/publications/{id}
+    change: added
+perms:
+  - code: admin.cms.read
+    change: unchanged