Until now the Pellicano wiretapping case has seemed the kind of down-and-dirty imbroglio that could only happen in Hollywood, where a private eye's underworld patois could impress movie people familiar with noir clichés, allured by real physical danger and accustomed to getting whatever they want. But confidential F.B.I. records show that the scandal's tentacles have extended beyond show-business figures to reach people prominent in the rarified worlds of fine art and classical music. Among the government's most important witnesses, the F.B.I. records suggest, are Adam D. Sender, a prominent collector of contemporary art and a wealthy hedge-fund manager..........hired Anthony Pellicano,...