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-agent-quality-phase05.md(PR#294) — 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-agent-quality-phase05.md

@@ -1,6 +1,6 @@
 # feature/agent-quality-phase05 任务卡
 
-任务主记录：Backend #123（组件）+ Dev PR（本分支收口）；状态：已完成；owner：weichen
+任务主记录：PR #294 https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Dev/pulls/294（merge 83d1cb20f6）；状态：已完成（回填）；owner：weichen
 
 ## 基线与授权
 
@@ -260,3 +260,9 @@
   "receipt_sha256": "2bdf8546e1b7c2968d9c78ea1ce7d9b56d24cac8379cffd879afc0647b511e5c"
 }
 ```
+
+## 闭合记录（card-autoclose 回填）
+
+- 依据：merge 83d1cb20f64b6eb0eb3f31451704cf9e27ad0072（PR #294）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 'Quality phase05: hard-fact gate, fact checks, lazy search (Backend #123)' (#294) from feature/agent-quality-phase05 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。