A great home for your chickens and a decent sized run. That was a lot of work.
I have a couple of comments. The mesh on the run isn't safe enough. A weasel will get through that weasily.
Half inch squares; it's ugly I know, but it's safe. A hardware cloth skirt around the outside perimeter of the run fence would also be a good idea.
If I was to go to those lengths I would do the interior walls with plywood sheeting; less gaps for mites to hide in and easier to clean for those projectile poops. No I don't know how they get poop in all the places they do.
Lose the candle if thats what it is. The risk of fire just isn't worth it.
I have a couple of comments. The mesh on the run isn't safe enough. A weasel will get through that weasily.

If I was to go to those lengths I would do the interior walls with plywood sheeting; less gaps for mites to hide in and easier to clean for those projectile poops. No I don't know how they get poop in all the places they do.

Lose the candle if thats what it is. The risk of fire just isn't worth it.