V4: Please bring back Review feature

What would you like to see?

Some sort of review or validation system so each feature could be validated by second user similar to HOT Tasking Manager validation.

Why is this useful?

This could open door for more unexperienced/beginner OSM contributors, which means having bigger userbase, bigger audience.

Additional context

I work for MSF Missing Maps and currently our main tool to coordinate mappers is HOT Tasking Manager. Which is a great tool for mapping buildings but less ideal for other features such as highways. We would like to use MapRoulette for mapping highways, but if we start pointing out beginners here we need some sort of validation / quality assurance to be able to provide them feedback so they know how to improve and let them know if they did something wrong.
I am not saying bring back 1:1 the same review system as is on the MR V3, but some sort of review system would be necessary for us to use this with less experienced users.
I saw the demo of MR V4 on SOTM in Paris and I absolutely love every other change. You did amazing job guys!

The issue names no files, tests, or entry points. Start by comparing the requested workflow with the MapRoulette V3 review system and clarifying the V4 requirements with the reporter. Done means the review or validation behavior is clearly specified for beginner contributors and implementable within the V4 frontend.