Generated code does not compile for EntityAttribute on Guid property with OnMissing.ThrowException

[JMounier]

Describe the bug

Using [Entity("MyGuidProp", OnMissing = OnMissing.ThrowException)] breaks code generation when MyGuidProp does not define the ?. Null-conditional operator (eg. when using Guid as the table's primary key).

Generated code from the To Reproduce example:

            // Trying to load the existing Saga data
            var operation = await solidContext.FindAsync<Models.Operation>(((Operator.RequireEntityByGuid)context.Envelope.Message).OperationId).ConfigureAwait(false);
            // Write ProblemDetails if this required object is null
            if (operation == null)
            {
                throw new Wolverine.Persistence.RequiredDataMissingException("Unknown Operation with identity {Id}".Replace("{Id}", ((Operator.RequireEntityByGuid)context.Envelope.Message).OperationId?.ToString() ?? ""));
            }

Resulting error:

Operator '?' cannot be applied to operand of type 'Guid' CS0023

This regression was introduced in #2147 (v5.15.0)

To Reproduce

public class Operation
{
    required Guid Id { get; set; }
}

public sealed record RequireEntityByGuid(Guid OperationId);

public class RequiredEntityByGuidHandler
{
    public static void Handle(
        RequireEntityByGuid __,
        [Entity("OperationId", OnMissing = OnMissing.ThrowException, Required = true)] Operation _
    ) { }
}

Expected behavior

Generated code should be compile.

Additional context

It is possible to workaround the issue by providing a MissingMessage to the EntityAttribute.

Note

It's even possible to have wolverine inject the found property value by using {0} in the message (cf. src/Wolverine/Persistence/ThrowRequiredDataMissingExceptionFrame.cs).