060daf02a184c327119eaab9ee7f5de65f8a790a
- 04-architecture 3.2:progress/vocab 加预留列 course_id(默认 family-album), 避免将来接入新概念英语等时迁移用户数据;MVP 仅留列不写多教材逻辑 - 06-tasks:T-301 验收注明该预留列;待办池补"多教材接入"扩展点备忘 Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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