If there’s one quality that defined Diane Keaton’s five decades of peerless movie performances, it was her irrepressible and unpredictable energy.  That’s what made the news of the Oscar winner’s death on Saturday at age 79 such a devastating shock.  All the way through to 2023’s “Book Club: The Next Chapter” and 2024’s “Summer Camp,” the actress was still the same galvanic woman who played Annie Hall, Kay Adams-Corleone and Erica from “Something’s Gotta Give.” Her passion, smarts and force of