

Yes it’s defects in the ingress-nginx controller package.
Yes it’s defects in the ingress-nginx controller package.
Depends on what you’re backing up. Is it configs for applications, images, video, etc? If it’s application configs, you can set up those applications in a virtual machine and have a process run that starts the machine, restores the configs, and makes sure the applications start or whatever other tests you want. There are applications for doing that.
If it’s images or videos, you can create a script to randomly pick a few, restore them, and check the integrity of the files. Usually just a check of the file header (first few bytes of the file) will tell you if it’s an image or video type of file and maybe a check on the file size to make sure it’s not an unreasonably small size, like a video that’s only 100 bytes or something.
All this seems like overkill though in most scenarios.
Problem is that unless the person was paid for contributing, what goods or services are being exchanged with the project. I mean if Microsoft received money from that person for a subscription or something I might see them having to ban the user and refund the money. But what did the project receive that would violate sanctions? Volunteer work is usually not covered or else relief organizations and religious missionaries would be banned and the US historically loves sending those. What am I missing?