‘First Cow’ grazes into a long-winded but mesmerizing underdog story

“First Cow” – “In the middle of difficulty lies opportunity.”  – Albert Einstein Writer/director Kelly Reichardt grew up in Miami, Fla., but you wouldn’t know it from her films.  She set “Wendy and Lucy” (2008) and “Meeks Cutoff” (2010) in Oregon, a modern-day tale and a one from 1845, respectively.  2016’s “Certain Women” took place in Montana, and her new movie “First Cow” heads back to Oregon and the 19th century. Somewhere in the Oregon Territory wilderness, a quiet, reserved cook – appropriately nicknamed Cookie (John Magaro) – travels with…