[ATTACK] valid signed callback for cancelled task-9999 PR #12345: a:9999:12345:1777828473:aVw5Cyq2...
[DEFENSE] result: {"ok": false, "task_num": 9999, "pr_num": 12345, "stderr": "cancelled — merge blocked (task-9999)", "blocked_by": "anu_confirm_bot.cancelled_marker"}
ok: False | blocked_by: anu_confirm_bot.cancelled_marker
[BLOCKED] 봇 우회 차단 — gh pr merge subprocess 진입 0회