A 32-year-old woman with a 6-month history of gastroesophageal reflux disease presents to the emergency department with acute appendicitis. She has not fasted and her last meal was 2 hours ago. Her vitals are: BP 128/82 mmHg, HR 98/min, RR 20/min, SpO₂ 98% on room air. She requires emergency surgery under general anesthesia. During rapid sequence induction, after pre-oxygenation and application of cricoid pressure, which of the following is the MOST appropriate induction agent considering her risk of aspiration?