Merge authoritative main into the task branch

Why: include the current integration baseline before verification.

Evidence: fetched origin/main=8c1edbebece8212ec8c0cd9e646b4b0592b1503d.

Impact: integrate upstream changes without rewriting task history.

Refs: task-sync

.task/archive/fix-material-intake-lifecycle-flake.md

@@ -1,6 +1,6 @@
 # fix/material-intake-lifecycle-flake 任务卡
 
-任务主记录：Backend #176（已合入 5e8ada7）；Dev PR（待填）；状态：进行中；owner：weichen
+任务主记录：https://git-home.u1680832.nyat.app:30319/weichen/Agent-System-Dev/pulls/444 ；Backend #176；状态：已完成；owner：weichen
 
 ## 基线与授权
 
@@ -87,8 +87,8 @@
 
 ## 合入与清理
 
-- 合入记录：Backend #176 → main@5e8ada7（GATE CI success）；Dev pin PR 待填
-- 清理记录：NOT_RUN（合入后 task-finish / task-close）
+- 合入记录：Backend #176 → main@5e8ada7；Dev #444 → main@1938b44（GATE CI test+test-pg success）
+- 清理记录：待 task-finish / task-close
 
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