`possibly-unresolved-reference` false positive inside function when both variable and function are defined in the same branch of an if statement

### Summary

```py
def _(value: bool):
   if value:
      a = 1

      def asdf():
         print(a) # possibly-unresolved-reference
```
https://play.ty.dev/f90a868c-cc44-4d7d-af01-9112b87e384a

### Version

0.0.1-alpha.8 (c1337c962 2025-06-02)