There's some slight risk that the company might have documented something internally just to cover their butt. There's also some slight risk that something like that might get returned on a PRIA request.

The company may not have an obligation to provide you with their PRIA data until AFTER they send it to a potential employer. HR/Legal folks may tend to not give up any info which they don't have to.

I would say that you need to somehow be pretty darn sure that you don't have anything which will show up before you decide to not disclose it.

If you disclose it, this is slightly better than violating the 8-hour rule, which is an FAR (and would be far more likely to impair safety). It might be an honest mistake to lose track of time and drink inside of 12 hours...but it would not be an honest mistake to choose to go fly knowing you were inside the limit.

Lesson learned, in addition to the obvious one...don't drink with FA's, they don't have nearly as much to lose as you do.