## Summary Fixes a bug where conditionally defined dataclass fields were previously ignored. Thanks to @lipefree for reporting this. ## Test Plan New Markdown tests
Final
## Summary Adds some tests for dataclass fields that are annotated with `Final` (see comment [here](https://github.com/astral-sh/ruff/pull/15768#issuecomment-3044737645)). Turns out that nothing is needed here, everything already works as expected (apart from the fact that we can assign to `Final` fields, which is tracked in https://github.com/astral-sh/ty/issues/158 ## Test Plan New Markdown tests
Before I'm adding even more dataclass-related files, let's organize them in a separate folder.