A federal judge ruled Saturday that the Kennedy Center must provide Rep. Joyce Beatty (D-Ohio) a “meaningful opportunity” to participate in next week’s board meeting on the storied institution’s revamp, but they don’t have to let her vote.  Beatty, an ex-officio member of the board, alleged that she was being barred from the March 16 session. Her lawyer later conceded she was in fact extended an invitation; it…