Happy reunion!!!
I had a similar experience with one of my tarantulas. Except she was free ranging for 4 years and somehow managed to make a move with us lol
I'd try to scrape together the funds for a vet visit though... I highly doubt she went an entire year without food. I'm sure she had a few wild critters here and there...
So my major concern would be parasites. If she ate any wild rodents in the past year, it could be contributing to her body condition. I'd go to the vet for some panacur. Ya know it wouldn't hurt to call around and ask - some vets would probably be ok with you bringing in just a fecal sample. Might be cheaper then a full out office visit.
Definitely at the very least weigh her regularly to track if she is gaining.