Restructure omni services and add Chatwoot research snapshot

research/chatwoot/app/models/email_template.rb

@@ -0,0 +1,28 @@
+# == Schema Information
+#
+# Table name: email_templates
+#
+#  id            :bigint           not null, primary key
+#  body          :text             not null
+#  locale        :integer          default("en"), not null
+#  name          :string           not null
+#  template_type :integer          default("content")
+#  created_at    :datetime         not null
+#  updated_at    :datetime         not null
+#  account_id    :integer
+#
+# Indexes
+#
+#  index_email_templates_on_name_and_account_id  (name,account_id) UNIQUE
+#
+class EmailTemplate < ApplicationRecord
+  enum :locale, LANGUAGES_CONFIG.map { |key, val| [val[:iso_639_1_code], key] }.to_h, prefix: true
+  enum :template_type, { layout: 0, content: 1 }
+  belongs_to :account, optional: true
+
+  validates :name, uniqueness: { scope: :account }
+
+  def self.resolver(options = {})
+    ::EmailTemplates::DbResolverService.using self, options
+  end
+end