A 52-year-old man from Delhi presents to a community health centre for cardiovascular risk assessment as part of a population screening programme. He is asymptomatic with no prior cardiac history. His blood pressure is 138/88 mmHg, BMI 28 kg/m², and fasting blood glucose 110 mg/dL. To determine his 10-year absolute cardiovascular risk and guide intensity of preventive therapy, which investigation is most appropriate?