Heartbeat monitor type

[Dominik727]

A heartbeat monitor helps you track periodic tasks by expecting regular requests to a unique URL.

If the expected heartbeat is not received within the specified frequency and grace period, it triggers an incident and alerts the configured on-call team.

[rajnandan1]

@Dominik727 I am reopening this issue #251

[rajnandan1]

Released #v3.2.1

Documentation https://kener.ing/docs/monitors-heartbeat

[Dominik727]

Thanks!