A 62-year-old woman with type 2 diabetes for 8 years attends for review. Her automated office blood pressure average is 144/86 mm Hg on repeated measurements. Urine albumin-to-creatinine ratio is 6 mg/mmol (elevated), and eGFR is 70 mL/min/1.73 m². According to Canadian guidelines, what is the most appropriate first-line antihypertensive agent to initiate?