[Feature]: Add option to specify downtime duration before sending notifications

[KamilKleina]

Describe the feature you would like to see

It would be great to have an option to define how long a service needs to be down before a notification is sent. This would help reduce unnecessary alerts caused by short-lived downtimes, such

1. Scheduled restarts that briefly take a service
2. Network hiccups or temporary connectivity
3. Auto-recovery mechanisms, where a service might restart successfully within a few seconds.

Describe how you would like to see this feature implemented

A configurable grace period or an option to retry X times before alerting would allow users to fine-tune their monitoring setup, ensuring that only persistent outages trigger notifications.

Would this be feasible to implement?

[rafasamp]

+1, currently sitting with 402 e-mails from an application that was flapping. The application should also be up for X amount of time before sending repeated alerts.

[henrygd]

402 e-mails from an application that was flapping

Woof. I'll prioritize this and try to get it in the next release.

[henrygd]

This has been added for the next release