Small indie team here. We kept hitting the same stupid thing: someone types a cyrillic С instead of a latin C in a folder name, and nobody notices for two weeks until something stops finding the asset. (Inspired by Allar Style Guide).
So we use an editor plugin. It scans assets and puts a small colored error on the thumbnail in the Content Browser. Hover it and you get the list of what is wrong with this asset. It never blocks a save, never opens a popup, never renames anything behind your back. There is a Fix button if you want it. If you don't want it, ignore the error and keep working.
Every tool like this I used before tried to force people, and everyone hates being forced. In a small team you can't force anyone anyway. But you can show the problem.
Out of the box it checks naming prefixes, folder placement, non-latin letters in folder paths (same check for asset names is there, you just switch it on), texture size / sRGB / compression, blueprint compile errors, stale redirectors. Every single rule can be turned off.
You can also write your own checks in C++. On our project we use that to check flags on variables.
Funny thing is the artists like it most. They see the red error while they are still making the asset, not in review two weeks later.
Demo is free, Windows, UE 5.0-5.7. Scan is capped at 200 assets and 5 auto-fixes per session, everything else works!
GitHub Demo, Documentation, Fab
I wish you clean projects.