Jasveen Sangha, the woman authorities have accused of supplying the ketamine that actor Matthew Perry died from using, is said to have had an extensive network for distributing the drug, but little is known about the woman police say is known as “the ketamine queen.”Sangha, according to the Department of Justice, which held a press conference about the investigation on Thursday, “took advantage of Mr. Perry by selling large amounts of ketamine to Mr. Perry over a two-week period in October of 20