DEAUVILLE, France — Everything changes; everything stays the same. Here's Eric Puerari, rounding off another sales season, his Haras des Capucines consignment an unmissable fixture right next to the parade ring at Arqana. Yet once again, on the eve of the auction, Puerari will on Friday have noticed new faces, making their serious, frowning notes as his mares are led up and down. Will these last any longer than some who surfaced in the previous cycle? Who can say? Plenty of them, Puerari acknowledges, have an authentically competent, dynamic air....