[`pyflakes`] `F401` cannot detect unused import

### Summary

I discovered this when I opened [`this*`](https://github.com/reagento/dishka/blob/6b36da4f15dc7e7eedf5ae5a4fc8469dfcfd78ff/src/dishka/integrations/faststream/faststream_06.py) in Pycharm

<img width="1002" height="752" alt="Image" src="https://github.com/user-attachments/assets/41527546-df91-4c3d-ac9b-d9471310d7c2" />

PyCharm:

<img width="1509" height="806" alt="Image" src="https://github.com/user-attachments/assets/d72e74c7-0aa3-4b01-8b94-aced36666293" />

Pyflakes:
```bash
❯ pyflakes xxx.py                                                                                                                              
xxx.py:43:5: redefinition of unused 'Context' from line 23     
```

Ruff:
```bash
❯ ruff check xxx.py --select F401 --preview                                                                                                    
All checks passed!
```


### Version

`ruff 0.14.11 (c920cf8cd 2026-01-08)`

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[`pyflakes`] `F401` cannot detect unused import #22554

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[pyflakes] F401 cannot detect unused import #22554

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[`pyflakes`] `F401` cannot detect unused import #22554