text: Title: Creating Pydantic objects in Rust and passing to the interpreter.
  Body: What's the best way to do this?
  
  I'd like to avoid passing JSON via Pyo3 to python and THEN creating the model.
  
  Use case:
  
  I am moving bounding box processing logic in my library [Docprompt](https://github.com/docprompt/Docprompt) into Rust. Documents can have tens of thousands of bounding boxes, so small overhead becomes an issue.
  
  Thank you for the help!