Below are some high resolution pictures of the inside of my ESC controller box. On closer inspection, I was not able to see any noticeable charring or burned components so that doesn't seem great. It does appear that there are multiple circuit boards on top of one another, but it's not clear to me how one would disassemble them without having to desolder a bunch of components. I can always try to take more pictures at a shallower angle if these don't show enough.
https://imgur.com/cwNaQal
https://imgur.com/7Wdku57