In an opinion Tuesday, Judge Furman ruled that the complaint in an “international saga” of fraud in the art world must be filed publicly and without redactions, even though it contained sensitive information about transactions facilitated by the international auction house Sotheby’s. Plaintiffs hired an art dealer to assist in purchasing a world-class art collection, and the dealer allegedly defrauded them of approximately $1 billion by purchasing the artworks himself and re-selling them to plaintiffs…