新增 workflow_run 事件處理: - GiteaWorkflowRun Pydantic model - handle_workflow_run() — status/conclusion=failure → TYPE-1 Incident - 透過 get_incident_service().create_incident_from_signal() 建立告警 - 純通知路徑,不觸發自動修復 2026-04-12 ogt (ADR-074 M3) Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>