After fighting for... days?... to figure out why using `@dataclass_transform` wasn't showing the expected intellisense in VSCode, I finally figured out that the Jedi language server doesn't seem to support PEP 681 at all?!

I didn't have access to Pylance (because it's proprietary), but https://open-vsx.org/extension/detachhead/basedpyright does seem to work.

(doing a bananas prototype where #Django models can be derived just from #Python typehints)