Giant daddy long legs is closest I found to it.
It was in an irrigation valve box with several others, had a strong web like a widow which is what I initially thought they were. No hourglass found on underside.
I agree with your ID of Artema atlanta. It appears to be a pet now. 🙂 Usually we see the Jerusalem Crickets submitted because they are mistaken for arachnids, not because they’re Spider Chow. That looks like the packing popcorn that’s made from corn (it tastes like corn too), which is an interesting idea for pet habitats. Widows look a lot different, btw, they have more spherical body segments and more color contrast in their markings. They have tanglewebs (cob webs) that I wouldn’t describe as strong. I’ve never seen Atema atlanta webbing in photos or in person.