By Daniel Wiessner (Reuters) – A California state judge has rejected Tesla Inc’s bid to send a lawsuit alleging widespread sexual harassment at the company’s flagship assembly plant to private arbitration, allowing it to move forward in court. California Superior Court Judge Stephen Kaus in Oakland denied Tesla’s motion to compel arbitration in a brief order without explanation on Monday. Lawyers for the plaintiff, Jessica Barraza, had argued that an arbitration agreement she signed was invalid because it improperly required her to bring legal claims in confidential proceedings while still all…