fix: resolve test failures from timezone conversion and interface rename

- Fix CriteriaSheetGenerator.FormatTimestamp to handle all DateTimeKind values
- Update TestWebApplicationFactory to use IAuthenticationService
- Add logger parameter to ExcelParserServiceTests
- Add SecureStoreManager to solution under /utils/ folder

NEW/tests/JdeScoping.Api.IntegrationTests/TestWebApplicationFactory.cs

@@ -53,12 +53,12 @@ public class TestWebApplicationFactory : WebApplicationFactory<Program>
 
             // Ensure fake auth is used for tests
             var authServiceDescriptor = services.SingleOrDefault(
-                d => d.ServiceType == typeof(IAuthService));
+                d => d.ServiceType == typeof(IAuthenticationService));
             if (authServiceDescriptor != null)
             {
                 services.Remove(authServiceDescriptor);
             }
-            services.AddSingleton<IAuthService, FakeAuthService>();
+            services.AddSingleton<IAuthenticationService, FakeAuthService>();
         });
     }