FOR A WHILE LAST YEAR, I SEEMED TO RUN into former District Attorney Gil Garcetti every week. He was hyperactive in his son Eric’s successful campaign for the City Council, and wherever Eric, a dogged campaigner, turned up, so did Gil, his top adviser. On one of those occasions, I asked the elder Garcetti what he wanted to do next in his own career. He said he wanted to be director of the Huntington Library. It’s pretty uncommon, I thought, for someone pushing 60 to propose so picturesque a payoff to a pu