对齐讲解业务单元静态数据口径

- 刷新讲解静态数据包并保留完整 outline 树
- 按后台顶层业务单元口径归并讲解点统计
- 更新讲解静态数据刷新操作文档

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

static/guide-data/README.md

@@ -21,6 +21,10 @@ Re-export:
 python scripts/export-guide-static-data.py
 ```
 
+Operational runbook for SSH tunnel export and explain-business refresh:
+
+- `docs/Data/explain-static-data-refresh-runbook.md`
+
 Optional arguments:
 
 ```bash