docs: repoint architecture docs at the workspace docs tree; ignore .scratch/

The workspace-root scratch cleanup (2026-09-27) deleted .repro/, the _review_*/
probe bundles and _probe_dataarea/. These tracked documents cited files inside
those directories, so their references are now explicitly marked as historical
and, where the evidence survived, repointed:

- record-channel.md section 7: the ten reproduction conditions are recorded in the
  archived review (docs/archive/reviews/phase12-review.md); reproduce.py is gone.
- studio-3d-stages.md: the _review_scene3d_20260914 review is archived under
  docs/archive/reviews/; the probe_stage6_* scripts and the .repro/ scan scripts
  are marked deleted. The perf report's stale .repro package path is explained in
  a note instead of editing the committed probe report, which feeds
  compile_scene.py --lock-from-probe.
- studio-architecture.md: the scan scripts that generated the diagrams are gone;
  the committed .svg/.png remain the surviving artefacts.

Also ignore .scratch/, the new per-task scratch directory (see
D:\orisys_ws\AGENTS.md). No source file is touched by this commit.

docs/architecture/studio-architecture.md

@@ -5,10 +5,15 @@
 
 生成方式（可复现，改完代码重跑即可）：
 
+> **脚本已不在工作区。** 下面两条命令指向 `D:\orisys_ws\.repro\` 下的一次性扫描脚本，该目录已清理
+> （2026-09-27 工作区整理），扫描脚本本身没有保留。**本文的框图与数字仍然有效** —— 矢量图
+> `studio-architecture.svg` 和 `studio-architecture.png` 已入库，是本文配套的、保留至今的产物。
+> 如需重跑，按下面的 `PYTHONPATH` 与两条命令的口径重写等价脚本即可；结论口径见下方"统计口径"。
+
 ```powershell
 $env:PYTHONPATH = 'D:\orisys_ws\orisys-app\shared\src;D:\orisys_ws\orisys-app\apps\studio\src'
-& $py D:\orisys_ws\.repro\studio_arch_scan.py       # 模块清单、包级依赖、环、Qt/GL/SDK 归属
-& $py D:\orisys_ws\.repro\studio_arch_imports.py    # 哪些模块在 import 时就拉进 Qt/GL/SDK，哪些是惰性
+& $py D:\orisys_ws\.repro\studio_arch_scan.py       # 模块清单、包级依赖、环、Qt/GL/SDK 归属 ← 脚本已删除
+& $py D:\orisys_ws\.repro\studio_arch_imports.py    # 哪些模块在 import 时就拉进 Qt/GL/SDK，哪些是惰性 ← 脚本已删除
 ```
 
 统计口径：行数含空行；`fan-in` = 有多少模块 import 它；`fan-out` = 它 import 了多少模块（同一模块多次
@@ -312,8 +317,10 @@ graph TB
 
 ---
 
-_本文与图由源码扫描生成；扫描脚本在 `.repro/studio_arch_scan.py`、`.repro/studio_arch_imports.py`
-（图表脚本 `.repro/make_studio_svg.py` → `.repro/svg_to_png.py`），原始数据在 `.repro/studio_arch.json`、
-`.repro/studio_arch_imports.json`。数字口径：行数含空行，`fan-out` = 该模块 import 了多少个模块。_
+_本文与图由源码扫描生成；扫描脚本 `.repro/studio_arch_scan.py`、`.repro/studio_arch_imports.py`
+与图表脚本 `.repro/make_studio_svg.py` → `.repro/svg_to_png.py`、原始数据 `.repro/studio_arch.json`、
+`.repro/studio_arch_imports.json` **均已在 2026-09-27 的工作区整理中删除**，未迁移。保留下来的是
+`.repro/` 之外的本文与图本身（`studio-architecture.svg`、`studio-architecture.png`）。
+数字口径：行数含空行，`fan-out` = 该模块 import 了多少个模块。_
 
 _生成时间：拆分 `app_window`（A1/A2 + B + C1 + C2 + 标定收尾 + 清零确认修复）之后。_