feat: add kill-switch control flow

docs/srs/Interface/req-043_control-channel-action-dispatch.md

@@ -1,6 +1,6 @@
 # req-043: trex.control.req 제어 채널 + action dispatch
 
-- Status: Approved
+- Status: Implemented
 - Type: Interface
 - Priority: High
 - Owner: project maintainers
@@ -113,3 +113,36 @@
 - 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(control dispatch 9 단위: pause/resume/list 회귀 + kill_switch/resume_kill_switch 라우팅 + unknown action + 워커 스레드 불변 + e2e control RPC)로 AC-1~6 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. 제어 큐 하위호환은 release rollout 결정.