Hi Timbersmom and neoow. Thank you for the responses, it makes me feel better about the way I've been handling this. I'll keep on with telling her, "I bite," putting her down, and walking away. She hasn't bitten me in a week now, and I spend a lot of time with her each day.
Vim was born in June of 2021, so she's 2. Right now she's a bit of a velcro bird. Boundary pushing is certainly on the table; she is changing a bit, although she still has a very gentle and shy personality.
I've also increased her sleep from 12 hours to 13.5. With how attached she is recently, I am worried that she's becoming hormonal, even though I've tried to follow the rules surrounding hormonal behavior (no body scratches, plenty of sleep, no nesting material, etc.).