chore: T2.7 acknowledgement (covered by T1.8)
Plan T2.7 = "setup_wizard.py 推荐 postgres，引导填 DATABASE_URL"。
T1.8 commit eae01901 已经实现：
- 加 "Use Postgres? (y = postgres, n = sqlite)" 问答，默认 y
- 选 y 时引导填 DATABASE_URL，可留空稍后填 .env
- writer.build_minimal_config(database_backend='postgres') 输出
database.backend=postgres + postgres_url=\$DATABASE_URL
无新代码改动；本 commit 仅为 task tracking 完整性。
Stage 0 PR2 T2.7（acknowledged-only）。
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
1445043649