WASHINGTON — A right-wing activist who spoke at Freedom Plaza on Jan. 5 and then joined the assault on the Capitol the next day provided information to the FBI about rally organizers and more than a dozen other members of the “Stop the Steal” movement as part of a plea deal to avoid a felony charge, according to court filings newly unsealed this week. At his sentencing hearing, assistant U.S. attorney Brittany Reed told a federal judge Straka’s conduct on Jan. 6 was “egregious” and, despite a cooperation agreement that got him out of a felony civil disorder charge, he...