framework_submission_services: add logged_duration around draft detail calculation
framework_submission_services: add logged_duration around draft detail calculation

this area of the view is showing poor performance so this should help us
pin down the source.

alphagov/digitalmarketplace-supplier-frontend,alphagov/digitalmarketplace-supplier-frontend,alphagov/digitalmarketplace-supplier-frontend,alphagov/digitalmarketplace-supplier-frontend