Fields mapped from .IncludeBase() not recognized during configuration validation

[remybellino-softconvergence]

Describe the bug
When migrating from AutoMapper, .IncludeBase() works as intended during mapping but no during validation: fields mapped from the base class are considered unmapped even though they are correctly handled when mapping child objects.

To Reproduce

// Minimal code to reproduce the issue
    private class TheBase { public string TheName { get; set; } }
    private class BaseDto { public string Name { get; set; } }

    private class Child : TheBase { public int MyProperty { get; set; } }
    private class ChildDto : BaseDto { public int MyProperty { get; set; } }

    var config = new MapperConfiguration(cfg =>
    {
        cfg.CreateMap<TheBase, BaseDto>().ForMember(dto => dto.Name, map => map.MapFrom(src => src.TheName));
        cfg.CreateMap<Child, ChildDto>().IncludeBase<TheBase, BaseDto>();
    });
    config.AssertConfigurationIsValid();  // <-- this throws

    var mapper = config.CreateMapper();
    var result = mapper.Map<ChildDto>(new Child { TheName = "aaa" });
    Assert.Equal("aaa", result.Name);  // <-- but this works

Expected behavior
Configuration is valid.

Actual behavior
Configuration is invalid, it throws the following exception:

System.InvalidOperationException : EggMapper configuration is invalid:
Unmapped destination member 'ChildDto.Name' in map Child -> ChildDto

Environment

• EggMapper version: 1.17.18
• .NET version: 10
• OS: Windows 11