It was a deal negotiated over fine wine and meals in luxury restaurants and mansions on both sides of the Pacific.But the 2015 agreement between Singapore billionaire Oei Hong Leong and Vancouver developer Terry Hui to jointly develop a trophy site that Oei owns in the heart of the Canadian city would collapse in legal acrimony, despite their decades-long friendship.Now, Oei is accusing Hui’s deputy of threatening “bodily harm”, in a C$245 million (US$175 million) lawsuit alleging that Hui…