A 58-year-old man with a 10-year history of alcohol use disorder presents to the emergency department with hematemesis and melena. On examination, he is tachycardic (HR 110/min), hypotensive (BP 95/60 mmHg), and has clinical signs of chronic liver disease. After two large-bore IV lines are established and initial fluid resuscitation is begun, what is the most appropriate next step in management?