Flag Asset as "Temp"?

Besides using tags (too prone to user error) it would be great if we had a way to flag any asset as “temp”. In pre-prod we’re using a lot of stand-in / half-finished assets, and tracking exactly where a temp asset is in use gets difficult.

Ideally, we’d be able to run a data validation check and have a window pop up telling us where temp assets are in use, or even just printing a warning to the log on a build, so we can be sure we didn’t accidently ship with an untextured asset or a WIP texture, etc.

EDIT: Alternatively, perhaps a flag to mark an asset as “Final” and optionally print warnings for non-final assets in the build?