In art and the economy, how do you measure success?...by Michael Gill...A few weeks before the Ingenuity Festival, Cuyahoga Arts and Culture released its first report to the public during a meeting at Severance Hall. Under the title "Sound Investment, Solid Impact," it tells of the services provided by arts groups in the county, thanks in part to support from CAC, plus a financial statement. The presentation had a liturgical feel as speakers — CAC board president Steve Minter, former Musical Arts Association president Dick Bogomolny — recited the history and…