Enhancement: make last update time available as expression variable

[m-kuhn]

It would be great to have more variables, related to cloud status available.

• cloud_last_pull
• cloud_last_push

This is great especially in combination with map decorations to have a quick idea of how recent the data is.

This would be interesting in both, QGIS and QField.

CC @posikifi

[posikifi]

It will also nice to have more expression fields in QGIS map decorations: like to change decorations color from green to yellow if cloud_last_update is more than 1 hour old.

[nirvn]

@posikifi , lovely idea. FYI, we'd need to implement expression based decorations, that's not in yet.