Nurse! We got a Bleeder...

You didn't mention the wheel cylinders in the back. Sometimes you don't see the leak from outside unless you pull the drums.
You are correct I didn't mention them, but I did check and they are dry and appear to show no leaks

Yes, internal leak of master cyl, if you have vac power assist sometimes rear seal can leak into booster or under dash if no power assist but you would see lower level of fluid in master cyl.
Under the pedal area was the last place I check before checking the level of the master cylinder everything is bone dry which is refreshing, but had me perplexed and why I'm focusing on the master.

My guess is master cylinder.
Me too..