variable of type `T` incorrectly highlighted as a type parameter

### Description

```py
def foo[T](value: T):
  _bar: T = value
```

<img width="490" height="291" alt="Image" src="https://github.com/user-attachments/assets/9b340183-a7cf-4e2c-930c-7a2fd78fb963" />

cc @KurtBoehm 