chore: Fix twilio inbox create transaction rollback (#9181)

chore: Fix twilio create transaction

app/controllers/api/v1/accounts/channels/twilio_channels_controller.rb

@@ -2,13 +2,9 @@ class Api::V1::Accounts::Channels::TwilioChannelsController < Api::V1::Accounts:
   before_action :authorize_request
 
   def create
-    ActiveRecord::Base.transaction do
-      authenticate_twilio
-      build_inbox
-      setup_webhooks if @twilio_channel.sms?
-    rescue StandardError => e
-      render_could_not_create_error(e.message)
-    end
+    process_create
+  rescue StandardError => e
+    render_could_not_create_error(e.message)
   end
 
   private
@@ -17,6 +13,14 @@ class Api::V1::Accounts::Channels::TwilioChannelsController < Api::V1::Accounts:
     authorize ::Inbox
   end
 
+  def process_create
+    ActiveRecord::Base.transaction do
+      authenticate_twilio
+      build_inbox
+      setup_webhooks if @twilio_channel.sms?
+    end
+  end
+
   def authenticate_twilio
     client = if permitted_params[:api_key_sid].present?
                Twilio::REST::Client.new(permitted_params[:api_key_sid], permitted_params[:auth_token], permitted_params[:account_sid])