feat: add kill-switch control flow

docs/srs/Data/req-044_killswitch-exclusion-store-and-migration.md

@@ -1,6 +1,6 @@
 # req-044: kill-switch day-scoped 제외 store + 테이블 + 마이그레이션
 
-- Status: Approved
+- Status: Implemented
 - Type: Data
 - Priority: High
 - Owner: project maintainers
@@ -114,3 +114,36 @@ kill-switch 발동 시 대상 범위(portfolio/전역)를 **당일(day-scoped)
 - 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(store in-mem 5 + PG 5: 스키마/멱등/day-scoped/clear/전역 sentinel; 마이그레이션 005 실 PG round-trip 인프라 게이트 290 passed)로 AC-1~7 충족.
+
+#### 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.