A $100 million lawsuit alleging Boohoo’s perennial markdowns amount to false advertising could result in the deposition of the fast-fashion e-tailer’s co-founder and executive chairman. Lawyers representing Farid Khan, Haya Hilton and Olivia Lee—the three plaintiffs suing Boohoo and its brands PrettyLittleThing and Nasty Gal for their pricing practices—filed to depose Mahmud Kamani June 18….