## Summary As mentioned in https://github.com/astral-sh/ruff/pull/16698#discussion_r2004920075, part of #15382, this PR updates the `is_gradual_equivalent_to` implementation between callable types to be similar to `is_equivalent_to` and checks other attributes of parameters like name, optionality, and parameter kind. ## Test Plan Expand the existing test cases to consider other properties but not all similar to how the tests are structured for subtyping and assignability.
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/red_knot_test/README.md for documentation of this test format.