Blueprint: Device offline notifications

### Description

Provide notifications to select emails/ phone numbers when a device goes offline for a given amount or time.
Maybe allow for disabling notifications while in developer mode.

Maybe the same could apply to cloud instances, but those just stay running, right?

This would have come in handy when a computer was unknowingly unplugged forcing me to lose data.

### Which customers would this be available to

Team + Enterprise Tiers (EE)

### Have you provided an initial effort estimate for this issue?

I can not provide an initial effort estimate