Close 1 merged task card(s) and archive them

Why: branches merged into main had left their task cards open; backfill status and archive to prevent bookkeeping debt.
Evidence: feature-rdm-u4-closeout.md(PR#374) — merges verified via git log --merges against origin/main.
Impact: .task/*.md moved to .task/archive/ with status backfilled; no code or submodule change.
Refs: task.sh close (card-autoclose-r1)

.task/archive/feature-rdm-u4-closeout.md

@@ -1,6 +1,6 @@
 # feature/rdm-u4-closeout 任务卡
 
-任务主记录：<PR 链接，交付前填写>；状态：进行中；owner：weichen
+任务主记录：PR #374 https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Dev/pulls/374（merge 94d0de327b）；状态：已完成（回填）；owner：weichen
 
 ## 基线与授权
 
@@ -68,7 +68,7 @@
 | 时间(UTC) | 命令 | 被测HEAD | exit | 来源 | sha256(16) |
 |---|---|---|---|---|---|
 
-## 结果与验证（完成后填写）
+## 结果与验证
 
 - 结果：
 - 验证：<结论摘要 PASS/FAIL/SKIP/NOT_RUN 逐项；逐条证据由 make evidence 写入上方证据表>
@@ -129,3 +129,9 @@
 | 同步前验收 | c0e123b35eeb61ee45d268a7c597b7e844f0d222 | 2ac0d071d5aebafd62660cfe3b8bf92bbf2ffdcb | 2026-10-11T15:08:59Z |
 | 同步前验收 | c0e123b35eeb61ee45d268a7c597b7e844f0d222 | f3e2b26a34ebe3c5bf58077f4400ee08f38b2bca | 2026-10-11T15:09:47Z |
 | 同步前验收 | 97002721485662c1e2abfa793f63d46f12cb14ce | 97e172ab6c23542736b1acbe2ccd9fe19b6f7b75 | 2026-10-11T15:17:34Z |
+
+## 闭合记录（card-autoclose 回填）
+
+- 依据：merge 94d0de327b6aebbeb50fed35029cc3302bfe2afe（PR #374）已包含于 origin/main，分支成果已落盘；本段为合入后回填。
+- 合并主题：Merge pull request 'Record U4 progress in the two-trees plan and pin the Dev combination' (#374) from feature/rdm-u4-closeout into main
+- 归档：随闭合移入 .task/archive/；任务执行期的过程证据见原任务记录与 PR。