I wouldn’t instantly disclose it before any questions have been asked but after the first stuttering incident you have that’s when I would mention it. If you do mention it I would still recommend playing it down as if it’s mild and not something that is a burden on your life (which we know it is for most of us) so essentially lie in that sense. Is just what I would personally do I’m sure other people will say different so don’t take what I say as gospel is just my opinion.