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We've had stories on this forum about front calipers discoloring on 1LEs. If I remember correctly, the common thread is aggressive track pad compounds that operate at higher temps, possibly combined with tracks that don't provide enough cooling zones for brakes. But I'm pretty sure this was happening over multiple track days or even longer, not one session as you experienced. And despite this, typically the SRF doesn't get boil as you experienced.
As far as I've heard on this forum, ESC uses the rear brakes to decrease yaw in an attempt to stop spins, not the front brakes. It's possible ESC was activating on corner exit exits, where increased engine power (from your tune) might be more apt to rotate the rear at a given throttle setting; But again, that should be the rear brakes, not the front.
You say you are advanced level so I assume you apply proper threshold break procedures to minimize heat being generated at the calipers. So to explain smoking brakes and discolored calipers it's pretty much limited to braking without ample cooling in between (either a track with lots of braking zones and no long straights, or somehow the calipers did not release properly). Given that you didn't have problems the rest of the day despite driving on the same track, I'd suspect some kind of caliper release problem. But never heard of that before.
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