Fix: Update contact validation messages (#3500)

Fixes #3476

app/controllers/api/v1/accounts/contacts_controller.rb

@@ -81,11 +81,6 @@ class Api::V1::Accounts::ContactsController < Api::V1::Accounts::BaseController
   def update
     @contact.assign_attributes(contact_update_params)
     @contact.save!
-  rescue ActiveRecord::RecordInvalid => e
-    render json: {
-      message: e.record.errors.full_messages.join(', '),
-      contact: Current.account.contacts.find_by(email: contact_params[:email])
-    }, status: :unprocessable_entity
   end
 
   def destroy

app/controllers/concerns/request_exception_handler.rb

@@ -37,7 +37,8 @@ module RequestExceptionHandler
 
   def render_record_invalid(exception)
     render json: {
-      message: exception.record.errors.full_messages.join(', ')
+      message: exception.record.errors.full_messages.join(', '),
+      attributes: exception.record.errors.attribute_names
     }, status: :unprocessable_entity
   end