Dorothy Brizill, the Executive Director of DCWatch, the ubiquitous local government watchdog group, was arrested and charged with assault yesterday after Tara Bridgett, an aide to deputy mayor for education Victor Reinoso, said Brizill grabbed her shirt and yanked the ID badge hanging from a lanyard around her neck. Brizill, who has been a local legend in D.C. politics for twenty years for her hardcharging questioning of municipal goings on, had been meeting with Reinoso…