StreamForest: Efficient Online Video Understanding with Persistent Event Memory - Zeng, Xiangyu; Qiu, Kefan; Zhang, Qingyu; Li, Xinhao; Wang, Jing; Li, Jiaxin; Yan, Ziang; Tian, Kun; Tian, Meng; Zhao, Xinhai; Wang, Yi; Wang, Limin (Advances in Neural Information Processing Systems, 2025)