WASHINGTON — Justice Ketanji Brown Jackson made her first appearance on the Supreme Court bench in a brief courtroom ceremony Friday, three days before the start of the high court’s new term.President Joe Biden, Vice President Kamala Harris and their spouses attended the invitation-only ceremonial investiture for Jackson, the first Black woman on the Supreme Court.Chief Justice John Roberts wished the 52-year-old Jackson a “long and happy career in our common calling,” the traditional welcome for a …