Update on the automatic vehicle hold, brake system, and drive system fault that immobilzed the car for future reference for y'all if you ever run into the same issue:
The front and rear drive unit coolant pumps had internal faults and overheated. It did not appear that it was an original factory installation issue as nothing looked out of place and all wiring was done correctly with no leaks. Might have just been a faulty part. They replaced both and tested with no issues. Car's on a tow truck on the way back to me now and hope that's the last of it.