Document intent of status page publishing services

ee/app/services/status_page/publish_details_service.rb

 # frozen_string_literal: true
 
 module StatusPage
+  # Render an issue as incident details and publish them to CDN.
+  #
+  # This is an internal service which is part of
+  # +StatusPage::PublishIncidentService+ and is not meant to be called directly.
+  #
+  # Consider calling +StatusPage::PublishIncidentService+ instead.
   class PublishDetailsService < PublishBaseService
     private
 

ee/app/services/status_page/publish_list_service.rb

 # frozen_string_literal: true
 
 module StatusPage
+  # Render a list of issues as incidents and publish them to CDN.
+  #
+  # This is an internal service which is part of
+  # +StatusPage::PublishIncidentService+ and is not meant to be called directly.
+  #
+  # Consider calling +StatusPage::PublishIncidentService+ instead.
   class PublishListService < PublishBaseService
     private