Korea Herald correspondent SEATTLE — The cabin lights dim to a warm amber. A lantern glows softly beside the seat as a flight attendant pours a chilled glass of sparkling wine. A sliding door closes, and for a moment, the hum of the Boeing 787-9 Dreamliner fades away. This is Alaska Airlines’ new international business-class suite, which debuted April 25 as part of the carrier’s long-haul rebrand. The airline introduced the suite on its first long-haul international route, Seattle-Incheon, follo