Acute Cholangitis with CBD Stone

A 68-year-old woman presents with fever, chills, jaundice, and right upper quadrant pain. She is hypotensive with altered sensorium. Labs show total bilirubin 7.2 mg/dL, ALP 740 U/L, WBC 22,000 with left shift, and lactate 3.6. Abdominal ultrasound shows the structure marked **A** (dilated CBD with stone at 14 mm) along with intrahepatic biliary radical dilation and pneumobilia. She had cholecystectomy 6 years ago. What is the most appropriate immediate management for this patient?