Thanks for the input!

It looks like the links didn't go through, so here's some more info. The relays i was looking are these ones: https://www.amazon.com/gp/product/B09G65YFZ6/

It looks like they actually are rated for DC, they just list 30V and 28V, and not 12V for some reason. Not sure if that changes anything.

And I do plan on adding some mechanical fire protection. Do you think these would be a good choice: https://www.amazon.com/Rangehood-Fire-Suppressor-1-pair/dp/B0863BFNWB/

I'd basically mount one a couple feet above the enclosure and if there was ever a big flare up it would hopefully douse the whole thing.