Notification on remote data sync issue

[XioNoX]

Is your feature request related to a problem? Please describe. I'm using more and more remote data in my maps, which is a very useful feature ! But I worry that some remote data providers changes endpoints or become temporarily unreachable, degrading the experience for the people using my maps.

Describe the solution you'd like I was wondering if it would be possible to get a notification (eg. e-mail) if the remote data endpoint returns a 404 or similar code for some amount of time. I was also wondering if umap would display previously cached data if the remote endpoint would temporarily be offline.

Describe alternatives you've considered There are no viable alternative I can think of. Things like external monitoring or caching the data myself in an intermediate tool wouldn't be convenient.

Thanks