Restructure omni services and add Chatwoot research snapshot

research/chatwoot/spec/models/folder_spec.rb

@@ -0,0 +1,15 @@
+require 'rails_helper'
+
+RSpec.describe Folder do
+  context 'with validations' do
+    it { is_expected.to validate_presence_of(:account_id) }
+    it { is_expected.to validate_presence_of(:category_id) }
+    it { is_expected.to validate_presence_of(:name) }
+  end
+
+  describe 'associations' do
+    it { is_expected.to belong_to(:account) }
+    it { is_expected.to belong_to(:category) }
+    it { is_expected.to have_many(:articles) }
+  end
+end