chore: Add assertion to infrastructure internal classes test (#1164)

<!--- Provide a general summary of your changes in the Title above -->

## Description

Adding an assertion on FailingTypes array, if there are failures, the
class names will be printed in the fail output



<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Documentation**
	- Clarified comments in the architecture test for improved readability.
  
- **Tests**
- Added a new line before assertions in the test method to enhance
structure.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

tests/Digdir.Domain.Dialogporten.Architecture.Tests/InfrastructureArchitectureTests.cs

@@ -16,7 +16,7 @@ public void All_Classes_In_Infrastructure_Should_Be_Internal()
             nameof(InfrastructureAssemblyMarker),
             nameof(InfrastructureExtensions),
 
-            // These classes are currently public, but should be internal, moved to another assembly, or deleted
+            // These classes are currently public but should be internal, moved to another assembly, or deleted
             nameof(OutboxScheduler),
             nameof(IUpstreamServiceError)
         };
@@ -29,6 +29,8 @@ public void All_Classes_In_Infrastructure_Should_Be_Internal()
             .And().DoNotHaveName(publicByDesignClasses)
             .Should().NotBePublic()
             .GetResult();
+
+        publicClasses.FailingTypes.Should().BeNullOrEmpty();
         publicClasses.IsSuccessful.Should().BeTrue();
     }
 }