public static ServiceDescriptorBuilder ApplyEmailSenderDefaults(this ServiceDescriptorBuilder builder, string?prefix)
 => builder
 .SetPath(prefix ?? "i_email_sender")
 .SetDefaultInputType(InputType.Json(EmailSenderJsonOptions.Default))
 .SetDefaultOutputType(OutputType.Json(EmailSenderJsonOptions.Default))
 .SetDefaultErrorType(ErrorType.Json(EmailSenderJsonOptions.Default))
 .SetNamingPolicy(NamingConvention.SnakeCase);