Imported posts that are then edited are treated as native

[cellio]

https://meta.codidact.com/questions/277939

If you go to the “Native” tab on a site, many imported questions show up. It appears to me that any question which was edited on Codidact is treated as a native question.

I'm not sure this is wrong, but it might mean we're mislabeling something. If "native" means "asked here" then this is a bug. If "native" means "either asked here or imported and then improved", maybe we need a different label (but I don't have one to propose).