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# 数据库迁移
本目录是业务项目唯一的 Alembic migration 流。
初始化时先同步框架 migration：
```bash
python -m flask --app app.py iti migrations sync
```
再升级数据库：
python -m flask --app app.py db upgrade
`versions/` 下的 migration 文件必须提交到 Git。