concern-with-concerns.rb

# app/models/concerns/states.rb
module States
  extend ActiveSupport::Concern
  included do
    enum state: [ :in_process, :processing, :processed, :failed_processing, :verified ,:deleted, :invalid_file, :sent_to_api ]
  end
end

# app/models/input_tracker.rb
class InputTracker < ApplicationRecord
	has_one :output_tracker
	include States
end

# app/models/output_tracker.rb
class OutputTracker < ApplicationRecord
	belongs_to :input_tracker
	include States
end