Stack overflow on recursive `TypeIs` with `Callable`

### Summary

This code:
```py
from typing import TypeIs
from collections.abc import Callable
type A = TypeIs[Callable[[], A]]
```
Causes a stack overflow like this: `thread '<unknown>' (22356) has overflowed its stack`
Note that this only applies to `TypeIs`, `TypeGaurd` works fine: https://play.ty.dev/74289a8f-cbff-4219-85a8-f3b8af2e8c10

### Version

ty 0.0.21 (c1ad9f281 2026-03-06)