IN APPRECIATION Andrew M. Blum, 89; Man Of Many Friends By JIM KEVLIN • Special to www.AllOTSEGO.com COOPERSTOWN – A mentor to young people, Andy Blum invited Cooperstown’s Jacob Russell to lunch at The Brook, the exclusive social club on East 54th Street. Henry Kissinger walked in. “I thought, ‘Wow, Henry Kissinger’,” said Jacob. The room was filled with Wall Street bigwigs, including Tom Hill, the Blackstone vice chairman. “They didn’t go up to Kissinger to kiss his ring,” said…