Idea: Publish definition should allow for associated model updates

[influitive-server]

Some models have methods that do not actually change the table. They have methods that are actually part of a different table. When setting up a publish you should be able to specify which other models should cause an update to the current publish

ie..

  publish fields: [
    :email_digest_send,
    :email_digest_last_sent
  ], identify_by: [:source_id, :database],
  publish_associate_model: [
     :CompanyMeta
  ]

side note: Using a symbol instead of Constant prevents loading errors with Rails.