Update XML doc comment in backend projects

web/backend/Features/Features.Emails/DependencyInjection/FeaturesEmailsServiceCollectionExtensions.cs

@@ -5,8 +5,15 @@ using Microsoft.Extensions.DependencyInjection;
 
 namespace Features.Emails.DependencyInjection;
 
+/// <summary>
+///     Registers the services used by the Features.Emails slice.
+/// </summary>
 public static class FeaturesEmailsServiceCollectionExtensions
 {
+    /// <summary>
+    ///     Registers the SMTP email provider, template renderer, and <see cref="IEmailDispatcher" />.
+    /// </summary>
+    /// <returns>The same <paramref name="services" /> instance, for chaining.</returns>
     public static IServiceCollection AddFeaturesEmails(this IServiceCollection services)
     {
         services.AddScoped<IEmailProvider, SmtpEmailProvider>();