Fix CS8602 null reference and IDE0055 formatting errors in Fitnet.Contracts

Co-authored-by: kamilbaczek <74410956+kamilbaczek@users.noreply.github.com>

Author: Copilot

Chapter-3-microservice-extraction/Fitnet.Contracts/Src/Fitnet.Contracts.Infrastructure/Database/Migrations/20230601184153_MakeSignedAtColumnNullable.cs

@@ -1,6 +1,7 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Contracts.Data.Database.Migrations;
+
 using System;
 using Microsoft.EntityFrameworkCore.Migrations;
 

Chapter-3-microservice-extraction/Fitnet.Contracts/Src/Fitnet.Contracts.Infrastructure/Database/Migrations/20230601184328_AddCustomerIdColumn.cs

@@ -1,6 +1,7 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Contracts.Data.Database.Migrations;
+
 using System;
 using Microsoft.EntityFrameworkCore.Migrations;
 

Chapter-3-microservice-extraction/Fitnet.Contracts/Src/Fitnet.Contracts.Infrastructure/Database/Migrations/20230624171216_ContractsAddColumnsToSupportContractExpiration.cs

@@ -1,8 +1,8 @@
 #nullable disable
 
 namespace EvolutionaryArchitecture.Fitnet.Contracts.Data.Database.Migrations;
-using
-    System;
+
+using System;
 using Microsoft.EntityFrameworkCore.Migrations;
 
 [ExcludeFromCodeCoverage]

Chapter-3-microservice-extraction/Fitnet.Contracts/Src/Fitnet.Contracts.Infrastructure/EventBus/EventBusModule.cs

@@ -24,10 +24,10 @@ internal static IServiceCollection AddEventBus(this IServiceCollection services,
                     return;
                 }
 
-                var uri = options.Value.Uri;
-                var username = options.Value.Username;
-                var password = options.Value.Password;
-                
+                var uri = options.Value!.Uri;
+                var username = options.Value!.Username;
+                var password = options.Value!.Password;
+
                 if (!string.IsNullOrEmpty(uri))
                 {
                     factoryConfigurator.Host(uri, h =>