A 9-month-old female infant born to parents from a tuberculosis-endemic region presents for routine immunisation. She received BCG at birth (visible scar present). On examination, she has a firm, non-tender axillary lymph node (1 cm) and is otherwise healthy with no constitutional symptoms. Her tuberculin skin test (TST) is 12 mm induration. According to the National Immunisation Schedule and IAP guidelines, what is the most appropriate next step regarding her immunisation status?