Data for issue reproduction

marten-orderby-dictionaryvalue-model.cs

   public class Car
    {
        public Guid Id { get; set; }
        public string Name { get; set; }

        public Dictionary<string, AttributeValue> Attributes { get; set; }
    }

    public class AttributeValue
    {
        public Guid Id { get; set; }
        public string Name { get; set; }
        public string Value { get; set; }
    }