Non-primitive value type as endpoint parameter can't be optional

[kemocca]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

Any non-nullable non-primitive value type parameter in endpoint declaration can not be optional.

Expected Behavior

Parameter must be just optional and have default value if not specified.

Steps To Reproduce

Map endpoint like that:

app.MapGet("/test", ([FromQuery] Guid optionalGuid = default) => { });

Exceptions (if any)

System.ArgumentException: "Argument types do not match":

System.Linq.Expressions.Expression.Constant(object, System.Type)
    Microsoft.AspNetCore.Http.RequestDelegateFactory.BindParameterFromValue(System.Reflection.ParameterInfo, System.Linq.Expressions.Expression, Microsoft.AspNetCore.Http.RequestDelegateFactoryContext, string)
    Microsoft.AspNetCore.Http.RequestDelegateFactory.CreateArgument(System.Reflection.ParameterInfo, Microsoft.AspNetCore.Http.RequestDelegateFactoryContext)
    Microsoft.AspNetCore.Http.RequestDelegateFactory.CreateArguments(System.Reflection.ParameterInfo[], Microsoft.AspNetCore.Http.RequestDelegateFactoryContext)
    Microsoft.AspNetCore.Http.RequestDelegateFactory.CreateArgumentsAndInferMetadata(System.Reflection.MethodInfo, Microsoft.AspNetCore.Http.RequestDelegateFactoryContext)
    Microsoft.AspNetCore.Http.RequestDelegateFactory.InferMetadata(System.Reflection.MethodInfo, Microsoft.AspNetCore.Http.RequestDelegateFactoryOptions)
    Microsoft.AspNetCore.Routing.RouteEndpointDataSource.CreateRouteEndpointBuilder(Microsoft.AspNetCore.Routing.RouteEndpointDataSource.RouteEntry, Microsoft.AspNetCore.Routing.Patterns.RoutePattern, System.Collections.Generic.IReadOnlyList<System.Action<Microsoft.AspNetCore.Builder.EndpointBuilder>>, System.Collections.Generic.IReadOnlyList<System.Action<Microsoft.AspNetCore.Builder.EndpointBuilder>>)
    Microsoft.AspNetCore.Routing.RouteEndpointDataSource.Endpoints.get()
    Microsoft.AspNetCore.Routing.CompositeEndpointDataSource.CreateEndpointsUnsynchronized()
    Microsoft.AspNetCore.Routing.CompositeEndpointDataSource.EnsureEndpointsInitialized()
    ...

.NET Version

8.0.22

Anything else?

No response