feat: add kill-switch control flow

docs/srs/Interface/req-045_kill-switch-execution.md

@@ -1,6 +1,6 @@
 # req-045: kill-switch 실행 — 범위별 holding 즉시 청산 + 이력 로깅
 
-- Status: Approved
+- Status: Implemented
 - Type: Interface
 - Priority: High
 - Owner: project maintainers
@@ -120,3 +120,36 @@
 - Existing Implementation Invalidated: no
 - Status Recommendation: keep-current
 - Follow-up Action: suggest-batch-reqs / draft-batch 로 delivery 편성.
+
+### CHG-20260607-03
+
+- Date: 2026-06-07
+- Author: Justin Ko
+
+#### Change Summary
+
+- Status Approved → Implemented (confirm-req-implemented, 근거 batch BAT-012 release-candidate).
+
+#### Intent
+
+- BAT-012 verification 의 AC↔evidence(실행 6 단위: 전역/portfolio 범위/idempotency/당일 제외 표시/resume 비가역/no-holding + e2e kill_switch global liquidated=2 → closed, emergency_stop reason)로 AC-1~8 충족. NFR-1/2 흡수 확인.
+
+#### Acceptance Criteria Delta
+
+- (변경 없음)
+
+#### Impacted Area Delta
+
+- (변경 없음)
+
+#### Delivery Trace Delta
+
+- Batches: BAT-012 (release-candidate)
+- Releases: none
+
+#### Revalidation Impact
+
+- Reverification Needed: no
+- Existing Implementation Invalidated: no
+- Status Recommendation: keep-current (Implemented)
+- Follow-up Action: draft-release 로 BAT-012 배포 편성. 실 KIS 라이브 발동은 운영 실증 이월.