delete-candidate / review
10 天清理規則
可用以下指令先預覽，再執行搬移（不直接刪除）：
python3 /home/ubuntu/.openclaw/workspace/scripts/cleanup_delete_candidates.py --days 10 python3 /home/ubuntu/.openclaw/workspace/scripts/cleanup_delete_candidates.py --days 10 --apply
搬移目的地：archive/purge_bin/<timestamp>/...