COW: Build out email notifications functionality (user-facing)

Summary

Build out email notifications functionality for CoW — user-facing notifications, distinct from the support form / existing-functionality verification tracked separately.

Context

• Email sending is built in — permissions already granted to the managed identity (confirmed by John Duprey, 2026-07-08).
• This item is about surfacing that capability as actual user-facing notifications (e.g. alerts, status updates), not just verifying the underlying send mechanism.
• Related/dependent: the vendor API failure monitoring idea (separate ticket) plans to route its alerts through this notification capability.

Source

#proj-cow — RVD, 2026-07-08

#proj-cow — RVD confirms distinct scope, 2026-07-08