Liza Foreman The prospect of watching a two-and-a-half hour documentary on Oscar winning film composer Ennio Morricone, directed by Giuseppe Tornatore, a Oscar winner himself with “Cinema Paradiso,” saw cineastes stream into the film’s Friday evening world premiere at the Venice Film Festival.There was a quiet gathering on the red carpet for Tornatore and friends, who posed for photos as Morricone’s compelling soundtracks played for arrivals.Even before the film began, Tornatore received a