For journalists of a certain age, “The Devil Wears Prada” offered both the romanticism of “All the President’s Men” and a reality check that, inside the media business, individual journalists are often merely cogs in a much larger machine. In 2006, Andy Sachs walked haplessly into the office of a glossy fashion magazine, got thrown into a sink-or-swim workplace drama and — spoilers for a movie now almost old enough to drink — learned to swim. Then she decided she wanted no part of it. In “The Devil Wears Prada 2,” released earlier this month, we learn Andy spent the next two decades schlepping it in pursuit of “real” journalism: filing investigative reports, covering far-off pockets of the world and publishing a series about the inner workings of the Federal Reserve. In the opening scenes, she wins a major award for that work. Then, because this is a movie about journalism in 2026, everything comes crashing down.…