false-positive warning "Parameter unfilled".

[spikyo]

Describe the bug
When I define a field in a model with its name in snake_case and its alias in camelCase, I get a false-positive warning that the parameter is unfilled.

To Reproduce
Steps to reproduce the behavior:

1. Create a model.
2. Add a ConfigDict(extra='forbid', validate_by_name=True).
3. Add a parameter with a name written in snake_case.
4. Assign this parameter a Field with an alias written in camelCase.
5. Try to instantiate the model, passing a value for the parameter using its snake_case key.
6. See the error.

Expected behavior
Parameters should be recognized as filled.

Screenshots

Environment (please complete the following information):
OS: macOS Sequoia 15.6.1
IDE: PyCharm 2024.3.5
Pydantic Version: 2.11.7

Question
Am I doing something wrong? Are there any workarounds for this?

[mrpiggi]

Probably related to #1086