SARATOGA SPRINGS, N.Y--As part of his wife Audrey's birthday celebration Thursday, Martin Schwartz took her to the winner's enclosure after the opener at Saratoga Race Course. They know the space well, but It was their first visit there in four years. The Schwartzes walked their 2-year-old filly Gold Lightning (Bolt d'Oro) in from the track after she won the 1 1/16-mile turf maiden by 2 1/4 lengths. She reached the wire on the inner turf course 1:45.93 and paid $31.40. Under jockey Manny Franco, Gold Lightning delivered a solid off-the-pace...