feat(alarm): trex-core 알람 emitter + trex.alerts exchange (dcy-033 BAT-049, Implemented)

AlarmEmitter(application, best-effort 비차단)+trex.alerts topic exchange 가산·격리+8 CRITICAL code 배선. 608 passed, opus QC PASS, 팀장 e2e(텔레그램 HTTP200) 통과. REQ-098~101 Implemented.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VHtM5Ws1HKCKQ4JGi6GRb5

docs/srs/Integration/req-099_alarm-exchange-topology.md

@@ -1,6 +1,6 @@
 # req-099: trex.alerts AMQP exchange 토폴로지 + 가산·격리 불변식
 
-- Status: Approved
+- Status: Implemented
 - Type: Integration
 - Priority: High
 - Owner: trex-core-dev
@@ -48,6 +48,20 @@
 
 ## Change Log
 
+### CHG-20260621-02
+- Date: 2026-06-21
+- Author: trex-core-dev
+
+#### Change Summary
+- Status: Approved → Implemented. BAT-049 confirm-batch-verification 팀장 승인(QC PASS-WITH-NOTES blocker 0 + 팀장 실인프라 e2e 통과). 실 RabbitMQ `trex.alerts`(topic,durable) 선언·기존 topology 불변 확인.
+
+#### Delivery Trace Delta
+- Batches: BAT-049 (release-candidate)
+- Releases: 미정
+
+#### Revalidation Impact
+- Reverification Needed: no
+
 ### CHG-20260621-01
 - Date: 2026-06-21
 - Author: trex-core-dev