By ANITA SNOW, Associated Press PHOENIX (AP) — Arizona caterer Pat Christofolo has been orchestrating high-end events for over a quarter-century: A lavish spread for a wedding dinner back-dropped by red rocks in Sedona, a holiday party for 1,000 in an airplane hangar, mezcal cocktails under the desert sky. But all the events she was scheduled to host this spring have been cancelled as fallout from