Feature-Request: Support Prometheus Monitoring for Mail Queue and Watchdog Alerts

[JoeRu]

Hi team,

I've encountered an issue recently where the mail queue stopped processing for unclear reasons. Although the watchdog system correctly identified and triggered warnings, those warnings were sent via email — which, due to the queue issue, never got delivered. This created a situation where the system was aware of the problem, but I remained unaware of it.

To improve resilience and observability, I’d like to propose adding Prometheus-compatible metrics for:

• Mail queue status (e.g., length, processing health)
• Watchdog alerts and status reports

Benefits:

• Provides a secondary, more robust alerting path
• Enables integration with existing Prometheus/Grafana setups
• Reduces dependency on email for critical alerts
• Helps in identifying issues before they become critical

I believe this would make the system more reliable, especially in production environments.

Thanks for considering this feature!

Best regards,
Johannes