Comprehensive design spec for a confined, env-scoped alerting feature:
6 signal sources, shared env-scoped rules with RBAC-targeted notifications,
in-app inbox + webhook delivery via admin-managed outbound connections,
claim-based polling for horizontal scalability, 4 CH projections for hot-path
reads. Backlog entry BL-001 / gitea#137 tracks deferred managed-CA investigation
(reuse SaaS-layer CA handling first before building in-server storage).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
