c78cfc838f
- repo delete_group/delete_activity + DELETE /cps/groups/{id} 与 /cps/activities/{id}
- 硬删记录但保留 cps_link:已发短链继续可用(落地页不依赖 group/activity 存活)
- 写审计 cps.group.delete / cps.activity.delete
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>