A court in Siberia has rejected an appeal by Ksenia Fadeyeva, an ally of the late Kremlin critic Alexei Navalny, Ksenia Fadeyeva, against a nine-year prison sentence for “extremism,” local mediareported Tuesday. Fadeyeva, Navalny’s former regional coordinator in Tomsk, was among his few allies who remained in Russia despite the risk of criminal prosecution after his political network was outlawed as “extremist” in 2021. Fadeyeva was detained later that year and, last December, sentenced after being found guilty of creating an “extremist organization.” A three-person Tomsk District Court board …