Rafa Sales Ross Guest Contributor The line sprawling along the corridors and staircases of De Doelen, the heart of the International Film Festival Rotterdam, alerted passersby that there was a star in town. The actor in question? German thesp Sandra Hüller, at the festival to support Jonathan Glazer’s “The Zone of Interest” and to give an in-depth talk about her career and latest projects. Hüller, who landed her first Oscar nomination for best actress last week for Justine Triet’s “Anatomy of a Fall,” said she is “definitely not” used to the growing attention.