Discovered the Owner's Manual hidden deep in the frunk and it answered my question. The lights are apparently "Orientation Lights" and stay on as long as the other key-out functions (windows, stereo, etc) do... two hours according to the book.
In the end, the car appears to be working as designed, I only needed to read the manual to learn this. Too bad the car doesn't have a convenient glove compartment to keep it in or I would have probably found it before asking the question.
