Record the dependency workspace proposal and review boundary

Why: Keep the approved direction and concrete pending decisions discoverable across sessions.

Evidence: The task card contains tool-written SELF precheck, task-sync, source inventory, and documentation validation receipts.

Impact: Add a project entry and task state for a locally saved Documents candidate without changing the pinned composition or active dependency policy.

Refs: Documents feature/dependency-workspace-plan; versioned-dependencies-and-workspaces r1

PROJECT.md

@@ -12,6 +12,12 @@
 目录中的既有文档不因被收录而自动成为已批准规划。记录、任务关联及收尾建议按
 [交付规范的长期方向与任务衔接](policy/delivery.md#长期方向与任务衔接) 执行。
 
+- [版本化依赖与按需源码工作区改造任务](.task/feature-dependency-workspace.md)：
+  Documents 主记录为 `docs/proposals/2026-10-13-versioned-dependencies-and-workspaces.md` r1，
+  保存于本地候选分支 `feature/dependency-workspace-plan`；具体方案与实施顺序待评审，
+  本仓尚未推进该 Documents gitlink。保留功能仓独立、Dev 单入口按需编辑，覆盖语言依赖、
+  RDM、正式构建/治理适配及 Guidelines 通用规则；迁移实施、验收、发布与部署 NOT_RUN。
+
 - [快慢通道展示与动态工作摘要方案 r1.1](modules/documents/docs/proposals/2026-10-12-fast-slow-channel-display.md)：
   对话即时答复、后台动态发现与来源、四层阅读、真实状态、并发/恢复及 U1–U4；
   2026-10-12 方案设计已批准（阶段 1–4），首批仅 U1；