When Bong Joon-ho’s “Parasite” became the first Korean film to win the Palme d’Or at this year’s Cannes Film Festival, it was the worthy culmination of a stellar career. The South Korean master has rattled off gem after gem with a modern monster movie of “Jaws” meets “Godzilla” in “The Host” (2006), a sci-fi social commentary about class divides on an action-packed speeding train in “Snowpiercer” (2013),