Laura Dern has been a clutch hitter for dozens of filmmakers going back to the 1980s. The innocence and vulnerability she portrayed in dark, moody David Lynch films like “Blue Velvet” and “Wild at Heart” did nothing to prepare audiences for her wildly different roles in Steven Spielberg’s big-budget “Jurassic Park,” or Alexander Payne’s withering satire “Citizen Ruth.” But among her four-plus decades on screen — which include a pair of Oscar nominations for 1992’s “Rambling Rose” and 2014’s “Wild” — the year 2017 might prove to be Dern’s most high-profile yet. In the coming months, the 49-year-old will not only debut in Lynch’s ultra-secretive “Twin Peaks” reboot on Showtime (set for May 21), but also the next chapter of the Star Wars trilogy, the as-yet-untitled “Episode VIII” (Dec.