Harden dev-flow: pre-authorization marker, alternatives log, check script

- Record rejected answers in decision.md at the moment they are rejected

- Allow explicit pre-authorized Build via a pre-authorized marker line

- Land scripts/check-dev-flow.sh and derive devflow/index.md from archives

- Add dev-flow process artifacts (decisions, prd) for open changes

devflow/glossary/CONTEXT.md

@@ -16,7 +16,7 @@
 ### 真理源 (Source of Truth)
 - **日期**和**短标识符 (slug)**：由目录名 `knowledge_YYYYMMDD_Slug/` 提取。
 - **显示标题**、**tags**、**author**：由 YAML frontmatter 提取。
-详见 [ADR-001](./adr/0001-directory-name-as-truth-source.md)。
+详见 [decision.md](../../openspec/changes/knowledge-index-panel/decision.md)（原 ADR-001，2026-09-18 迁移）。
 
 ### 短标识符 (Slug)
 目录名中 `YYYYMMDD_` 之后的部分。用于脚本定位目录和构建文件路径。不用于显示（显示标题来自 YAML frontmatter 的 `title` 字段）。