Sorry about your bird. I know bumblefoot surgery can be done on quail, but it's expensive/hard to find a vet and stressful for the animal. Here's hoping she improves, and you should be fine eating her eggs in the meantime.
It shouldn't be an issue. Unless it progressed to a systemic infection (which you'd know about because the bird would be dead/dying), bacteria from the foot can't easily make their way into the eggs.