refactor: update return statement syntax and fix interface formatting

Author: kamilbaczek

Chapter-4-applying-tactical-domain-driven-design/Fitnet.Common/Fitnet.Common.IntegrationTestsToolbox/TestEngine/Database/IDatabaseConfiguration.cs

@@ -2,5 +2,5 @@ namespace EvolutionaryArchitecture.Fitnet.Common.IntegrationTestsToolbox.TestEng
 
 public interface IDatabaseConfiguration
 {
-    public Dictionary<string, string?> Get();
-}
+    Dictionary<string, string?> Get();
+}

Chapter-4-applying-tactical-domain-driven-design/Fitnet.Common/Fitnet.Common.IntegrationTestsToolbox/TestEngine/EventBus/EventBusExtensions.cs

@@ -54,6 +54,6 @@ public static async Task<IEnumerable<IReceivedMessage<TMessage>>> WaitToConsumeM
             }
         }
 
-        return testHarness.Consumed!.Select<TMessage>(cancellationToken)!.ToList();
+        return [.. testHarness.Consumed!.Select<TMessage>(cancellationToken)!];
     }
 }