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-100_core-alarm-emitter.md

@@ -1,6 +1,6 @@
 # req-100: trex-core 알람 emitter — CRITICAL code 발신 배선
 
-- Status: Approved
+- Status: Implemented
 - Type: Integration
 - Priority: High
 - Owner: trex-core-dev
@@ -68,6 +68,20 @@
 
 ## 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). AlarmEmitter 29 단위 테스트 통과(8 code × 정상+예외 케이스). 텔레그램 sendMessage HTTP 200 e2e 확인. 잔여: reset.py 2 code 간접 검증(non-blocker, 정직 공개).
+
+#### 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