A 58-year-old man from Mumbai presents with progressive dyspnea on exertion and orthopnea for 6 months. On examination, he has a blood pressure of 95/60 mmHg, elevated JVP, and bilateral ankle edema. Echocardiography shows a thick-walled left ventricle with restrictive filling pattern and ejection fraction of 45%. Cardiac biomarkers (troponin I, BNP) are markedly elevated. A endomyocardial biopsy shows Congo red-positive material with apple-green birefringence under polarized light. What is the most likely type of amyloid deposited in this patient's myocardium?