Add monitoring and alarm to the email feature, so we are able to detect/respond to possible problems for deliverability

Have data/logs that enable the detection and remediation of email-related issues such as unacceptable bounce-rate or spam-blocking issues.

See https://learn.microsoft.com/en-us/azure/communication-services/concepts/analytics/logs/email-logs (the smpt codes/details are needed)

See #1111 for an OTP specific extension (e.g. also detect too rapid incread in error-free usage).