This story was first published in The Mercury News. When Pecolia Manigo’s eldest daughter lost out on a $20,000 scholarship after a breakdown over a grade dispute, Manigo heard more than one family’s frustration with a school system. She heard the harm she had spent years trying to prevent. As a co-chair of Oakland Unified School District’s original Black Thriving Task Force, Manigo had helped build an unprecedented framework aimed at repairing the harms Black parents and community leaders say…