I'll say it again... it's a tire/wheel balance issue.
Can be a damaged rim or tire, or the balance weight is gone.
You are right.
"Front tire is pretty new at less than 3k miles on it. "
"I just noticed it today when riding"
The question is, what has changed, since the tire got on the rim, < 3k miles ago
Is the balance weight gone?
Is it more with cold or hot tires, or always?
Is a fork spring involved?
But what has changed, for sure, is the thickness of the rubber on the carcass.
Even the IRC's are losing some mm on 3k miles.
That's why I pointed on the shimmy.
Less rubber on the carcass, less damping. In case, it comes from there.
It's still not a radial. Can happen.
Also how old is the tire? How much UV did it get
As older, as harder. Less damping
There are several options to the tire wheel balance thing.
And I assume, usually, that a rider will look for tire (pressure, damage), rim-damage or
a gone balance weight, before he starts to ask others.
Maybe I expect to much?