(Photo: Bayreuther Festspiele) Was it possible for director Jay Scheib to offer a production even more unappetizing than his 2023 debut of “Parsifal,” with its much-touted AR frills? Yes it was, and it was on full display last night. This slightly rearranged version, with needless costume tweaks, ruinous visual design, and arbitrary staging, threatened even this most sublime of Richard {…}