WASHINGTON — When Gail Curley began her job as Marshal of the U.S. Supreme Court less than a year ago, she would have expected to work mostly behind the scenes: overseeing the court’s police force and the operations of the marble-columned building where the justices work.Her most public role was supposed to be in the courtroom, where the Marshal bangs a gavel and announces the entrance of the court’s nine justices. Her brief script includes “Oyez! Oyez! Oyez!” — meaning “hear ye …