feat: Add contact_type attribute to contact model (#8768)

app/models/contact.rb

@@ -6,6 +6,7 @@
 #
 #  id                    :integer          not null, primary key
 #  additional_attributes :jsonb
+#  contact_type          :integer          default("visitor")
 #  custom_attributes     :jsonb
 #  email                 :string
 #  identifier            :string
@@ -55,6 +56,8 @@ class Contact < ApplicationRecord
   after_update_commit :dispatch_update_event
   after_destroy_commit :dispatch_destroy_event
 
+  enum contact_type: { visitor: 0, lead: 1, customer: 2 }
+
   scope :order_on_last_activity_at, lambda { |direction|
     order(
       Arel::Nodes::SqlLiteral.new(