ci: 移除 Alert Chain + Monitoring Coverage 的 continue-on-error

告警鏈路失敗 / 覆蓋率不足 → 阻塞部署 (B5 技術債清除)
保留: SSH scp 188 (網路不穩) + E2E Playwright (瀏覽器環境)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitea/workflows/cd.yaml

@@ -423,9 +423,9 @@ jobs:
       # Phase O-4.5 2026-04-02: Alert Chain Smoke Test (Wave A.6 + B.2 ADR-037)
       # 驗證告警鏈路 E2E: API Health + Webhook + OTEL + Event Exporter
       # 2026-04-05 Claude Code cache優化: 使用 /opt/api-venv (已有 requests)，移除 Setup Python Tools step
+      # 2026-04-10 ogt: 移除 continue-on-error — 告警鏈路失敗必須阻塞部署
       - name: Alert Chain Smoke Test
         id: alert_chain_smoke
-        continue-on-error: true
         run: |
           # 2026-04-05 Claude Code: 使用真實 API 地址（192.168.0.121:32334 NodePort）
           # CI job container 的 localhost 不等於 K3s 節點，必須用內網 IP
@@ -438,10 +438,9 @@ jobs:
             || echo "alert_chain_status=fail" >> $GITHUB_OUTPUT
 
       # Phase O-5 Wave C.2 2026-04-02 ogt: 監控覆蓋率驗證 (generate_monitoring.py --check)
-      # continue-on-error: true — 覆蓋率不足不阻塞部署，但反映在 TG 通知
+      # 2026-04-10 ogt: 移除 continue-on-error — 覆蓋率不足必須阻塞部署
       - name: Monitoring Coverage Check
         id: monitoring_coverage
-        continue-on-error: true
         run: |
           source /opt/api-venv/bin/activate
           python3 scripts/generate_monitoring.py --check && echo "coverage_status=pass" >> $GITHUB_OUTPUT || echo "coverage_status=fail" >> $GITHUB_OUTPUT