Sorry your dad is doing this, I do think drawing boundaries in a way you see as appropriate is a good idea, you know him best and will know which way to say you don’t want to engage in this.

My parents do this about another family member, it is ridiculous to me that they still refer to something which happened 40 years ago in such detail. I try to cut them off a redirect when they do this. In my parents case a big part of it is not having enough to occupy their minds in the present moment. I do have the urge to sing ‘Let it go’ at moments like that though.