...I cannot see anything in your photos that I cannot attribute to reflections and light, so if maybe you could either describe what's going on a little more, or put some kind of red arrow or circle on the bulge, I could maybe give you a better idea of my impression, and what, if anything I might do.

From what I see, there's nothing affecting alignment or fork rake, so if your headset cups fit, and everything else is aligned (which given your description ought to be a simple job), it sounds like owne of those things like a small dent in a tube that you wish was not there, but does not affect the ride and handling.