Jofin T. Chacko’s “Rekhachithram” is an impressive work that combines a fascinating murder story with a loving look back at the best days of Malayalam films. The movie's unusual storytelling method revisits the production of "Kathodu Kathoram" from 1985, carefully putting together different time periods to create a version of what might have been—something believable and absorbing. Asif Ali gives a thoughtful portray…