Next time make sure you stick some pretty flowers to her, she can be decorative while it sheds off.
Seriously, it's just a accident and not only have you learned that the snakes will get into the worst position just when you don't want them to... you've POSTED about it which means it will be a lesson to everyone else to not be complacent about using hot glue guns around critters that SHOULD know to stay away.
It should shed off next time she sheds without any issue. I'm sure she's fine. It's really no different than a bit of tree sap and I've found plenty of colubrids with bits of tree sap stuck to them(and assorted bits of bark, leaves, pine needles, dirt stuck to the sap) and they weren't bothered by any of it.