Bypass validation of the EqualityContract property

On C# 9.0 `record` types, the `EqualityContract` property is generated by the compiler, but it is not intended to be mapped by `ReverseTopicMappingService`.

Author: JeremyCaney

OnTopic/Mapping/Reverse/BindingModelValidator.cs

@@ -173,6 +173,13 @@ static internal void ValidateProperty(
         return;
       }
 
+      /*------------------------------------------------------------------------------------------------------------------------
+      | Skip properties injected by the compiler for record types
+      \-----------------------------------------------------------------------------------------------------------------------*/
+      if (configuration.Property.Name is "EqualityContract") {
+        return;
+      }
+
       /*------------------------------------------------------------------------------------------------------------------------
       | Handle mapping properties from referenced objects
       \-----------------------------------------------------------------------------------------------------------------------*/