PUBLISHED IN THE CANADIAN COMPOSER, APRIL 1986     SURVIVING WITH RUSH     Drummer-lyricist Neil Peart looks forward      By Nick Krewen   The mark of longevity in the music business is originality. Usually, a band that lasts in this fashionably fickle marketplace does so by leaving an indelible imprint on audiences. For the 12 years that drummer Neil Peart has been a part of Rush with guitarist…