===== C cancel-mid-queue: First-line guard refuses merge =====

===== test 1: anu_confirm_bot._execute_approve refuses cancelled task =====
result: {"ok": false, "task_num": 9999, "pr_num": 99, "stderr": "cancelled — merge blocked (task-9999)", "blocked_by": "anu_confirm_bot.cancelled_marker"}
cancelled marker blocked merge: True

===== test 2: CI cancel-kill-switch step (re-enacted) =====
::error::Cancelled task — CI FAIL (task-9999)
exit_code=1 (CI step would FAIL)

===== test 3: AutoMerger.execute_merge raises on cancelled =====
RuntimeError raised: cancelled — merge blocked [task-9999] (.cancelled 마커 존재)
cancelled marker blocked merge: True