Add frozen_string_literal magic comment

re: https://www.rubydoc.info/gems/rubocop/RuboCop/Cop/Style/FrozenStringLiteralComment

app/models/ability.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Ability
   include CanCan::Ability
 

app/models/admin_ability.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AdminAbility
   include CanCan::Ability
 

app/models/ahoy/event.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ahoy
   class Event < ApplicationRecord
     self.table_name = 'ahoy_events'

app/models/answer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Answer < ApplicationRecord
   has_many :qanswers
   has_many :questions, through: :qanswers

app/models/application_record.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 end

app/models/booth.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Booth < ApplicationRecord
   include ActiveRecord::Transitions
   has_paper_trail ignore: [:updated_at], meta: { conference_id: :conference_id }

app/models/booth_request.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BoothRequest < ApplicationRecord
   belongs_to :booth
   belongs_to :user

app/models/campaign.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Campaign < ApplicationRecord
   validates :name, :utm_campaign, presence: true
 

app/models/cfp.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # cannot delete program if there are events submitted
 
 class Cfp < ApplicationRecord

app/models/comment.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Comment < ApplicationRecord
   acts_as_nested_set scope: %i(commentable_id commentable_type)
   validates :body, presence: true

app/models/commercial.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Commercial < ApplicationRecord
   require 'oembed'
 

app/models/concerns/revision_count.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module RevisionCount
   extend ActiveSupport::Concern
 

app/models/conference.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Conference < ApplicationRecord
   include RevisionCount
   require 'uri'

app/models/contact.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Contact < ApplicationRecord
   has_paper_trail on: [:update], ignore: [:updated_at], meta: { conference_id: :conference_id }
 

app/models/difficulty_level.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class DifficultyLevel < ApplicationRecord
   belongs_to :program, touch: true
   has_many :events, dependent: :nullify

app/models/email_settings.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EmailSettings < ApplicationRecord
   belongs_to :conference
 

app/models/event.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Event < ApplicationRecord
   include ActiveRecord::Transitions
   include RevisionCount

app/models/event_schedule.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EventSchedule < ApplicationRecord
   default_scope { where(enabled: true) }
   belongs_to :schedule

app/models/event_type.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EventType < ApplicationRecord
   belongs_to :program, touch: true
   has_many :events, dependent: :restrict_with_error

app/models/event_user.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EventUser < ApplicationRecord
   # TODO: Do we need these roles?
   ROLES = [%w[Speaker speaker], %w[Submitter submitter], %w[Moderator moderator]]

app/models/events_registration.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EventsRegistration < ApplicationRecord
   belongs_to :registration
   belongs_to :event

app/models/lodging.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Lodging < ApplicationRecord
   belongs_to :conference
 

app/models/openid.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Openid < ApplicationRecord
   belongs_to :user
   validates :provider, :uid, :email, presence: true

app/models/organization.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Organization < ApplicationRecord
   resourcify :roles, dependent: :delete_all
 

app/models/payment.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Payment < ApplicationRecord
   has_many :ticket_purchases
   belongs_to :user

app/models/physical_ticket.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PhysicalTicket < ApplicationRecord
   belongs_to :ticket_purchase
   has_one :ticket, through: :ticket_purchase

app/models/program.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # cannot delete program if there are events submitted
 
 class Program < ApplicationRecord

app/models/qanswer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Qanswer < ApplicationRecord
   belongs_to :question
   belongs_to :answer, dependent: :delete

app/models/question.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Question < ApplicationRecord
   belongs_to :question_type
   has_and_belongs_to_many :conferences

app/models/question_type.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class QuestionType < ApplicationRecord
   has_many :questions
 end

app/models/registration.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Registration < ApplicationRecord
   require 'csv'
   belongs_to :user

app/models/registration_period.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RegistrationPeriod < ApplicationRecord
   belongs_to :conference
 

app/models/resource.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Resource < ApplicationRecord
   belongs_to :conference
   validates :name, :used, :quantity, presence: true

app/models/role.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Role < ApplicationRecord
   belongs_to :resource, polymorphic: true
   has_many :users_roles

app/models/room.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Room < ApplicationRecord
   include RevisionCount
   belongs_to :venue

app/models/schedule.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Schedule < ApplicationRecord
   belongs_to :program
   belongs_to :track

app/models/splashpage.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Splashpage < ApplicationRecord
   belongs_to :conference
 

app/models/sponsor.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Sponsor < ApplicationRecord
   belongs_to :sponsorship_level
   belongs_to :conference

app/models/sponsorship_level.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SponsorshipLevel < ApplicationRecord
   validates :title, presence: true
   belongs_to :conference

app/models/subscription.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Subscription < ApplicationRecord
   belongs_to :conference
   belongs_to :user

app/models/target.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Target < ApplicationRecord
   include ActionView::Helpers::TextHelper
 

app/models/ticket.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Ticket < ApplicationRecord
   belongs_to :conference
   has_many :ticket_purchases, dependent: :destroy

app/models/ticket_purchase.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TicketPurchase < ApplicationRecord
   belongs_to :ticket
   belongs_to :user

app/models/ticket_scanning.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TicketScanning < ApplicationRecord
   belongs_to :physical_ticket
 

app/models/track.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Track < ApplicationRecord
   include ActiveRecord::Transitions
   include RevisionCount

app/models/user.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class IChainRecordNotFound < StandardError
 end
 

app/models/users_role.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UsersRole < ApplicationRecord
   belongs_to :role
   belongs_to :user

app/models/vchoice.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Vchoice < ApplicationRecord
   belongs_to :vday
   belongs_to :vposition

app/models/vday.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Vday < ApplicationRecord
   belongs_to :conference
 

app/models/venue.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Venue < ApplicationRecord
   belongs_to :conference
   has_one :commercial, as: :commercialable, dependent: :destroy

app/models/visit.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Visit < ApplicationRecord
   has_many :ahoy_events, class_name: 'Ahoy::Event'
   belongs_to :user

app/models/vote.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Vote < ApplicationRecord
   belongs_to :user
   belongs_to :event

app/models/vposition.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Vposition < ApplicationRecord
   belongs_to :conference