Azure Functions Timer Trigger Transactional Email with Rovela (2026): NCRONTAB + Key Vault + Idempotency-Key per Window
Wire an Azure Functions Timer Trigger (NCRONTAB, App Settings / Key Vault references, WEBSITE_TIME_ZONE where supported) to POST /emails with a window-scoped Idempotency-Key for digests and ops reports—distinct from GCP Scheduler, EventBridge, and Netlify/Fly/Render cron.