Why: branches merged into main had left their task cards open; backfill status and archive to prevent bookkeeping debt.
Evidence: feature-pptx-gate-reference-integrity.md(PR#559) feature-workbench-visual-redesign.md(PR#556) — merges verified via git log --merges plus Gitea API squash lookup 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)
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Why
feature/pptx-register-structural-gate(#543)与 feature/pptx-gate-reference-integrity(#559)均已合入,任务卡回填归档(原 PR #560 因远端分支误删重建)。
Evidence
Refs