Source-generated generic class inference ignores inherited Arguments rows #7490

Summary

Source-generated discovery cannot infer a generic test class from an inherited [Arguments(42)] constructor row. The same row declared on the derived class infers int. Inherited argument values are available at compile time, so this reports an unnecessary generic inference failure; explicitly adding [GenerateGenericTest(typeof(int))] works.

Reproduction

[Arguments(42)]
public abstract class Base;

public class Derived<T>(T value) : Base
{
    [Test]
    public void Test() { }
}

Run source-generated discovery with --treenode-filter "/*/*/Derived/*". Move [Arguments(42)] to Derived<T> to compare.

Expected and actual

Expected: one passing test with T = int, as for a directly declared row. Actual: one failed test saying the class type arguments cannot be inferred at compile time. Reflection discovery with the inherited-class-source fix runs one passing test.

Environment

TUnit source at 9100521, SDK 10.0.403, net10.0, macOS arm64. Observed in tests/TUnit.TestProject/Bugs/_7426/Tests.cs before adding explicit generic arguments while validating #7426.

Please include inherited [Arguments] rows in compile-time generic class inference.