Awards season is upon us again, returning with raging film snobbery and an endless red-carpet parade, with designer one-upmanship among the extravagantly trussed stars, glittering in their borrowed gems and posing in towering heels. But one red carpet essential remains consistently on the radar of those with a discerning eye: a classic envelope clutch in demure satin or rich crushed velvet in an array of jewel or muted tones, similar to the timeless style seen in modern even