Changes to Get transform

added the optional property partition_expression to the response with the 200 status

added the required property clustering_columns to the response with the 200 status

added the required property rebuild_trigger to the response with the 200 status

added the optional property draft_sql_template to the response with the 200 status

added the required property has_unpublished_changes to the response with the 200 status

added the optional property cron_expression to the response with the 200 status