For those living in Paris over the past few years, the opening ceremony for the Olympic Games may feel more like reaching the finish line than toeing it, exhausting for organizers and Parisians alike. Spiffing up the city for the Games has been like trying to complete all of Hercules’s labors at once, with so many miles of torn-up streets, capricious metro closings, bus detours to parts unknown and monuments swaddled Christo-style.