A 28-year-old woman is admitted following blunt abdominal trauma from a fall. On examination, she has tenderness in the epigastrium and left upper quadrant. FAST is positive for free fluid. CT abdomen shows a Grade IV pancreatic laceration with ductal injury and peripancreatic fluid collection. She is haemodynamically stable (BP 115/72, HR 92/min) with normal amylase. What is the most appropriate next step in management?