Cate Blanchett is diving deeper into the fashion business — on the big screen. The Oscar-winning actress and her production company Dirty Pictures with Andrew Upton and Coco Francini have boarded the documentary adaptation of Dana Thomas’ book Fashionopolis: The Price of Fast Fashion and the Future of Clothes, being directed by noted auteur Reiner Holzemer. The project, which is moving into the financing phase, investigates the $3 trillion global fashion industry by examining the “environmental and human cost of an industry built on speed and scale while spotlighting the designers and innovators reshaping the system,” per the filmmakers.…