A 38-year-old woman from rural Maharashtra presents with a 6-month history of progressive dyspnea, dry cough, and constitutional symptoms (fever, weight loss, night sweats). Chest X-ray shows bilateral hilar lymphadenopathy with right upper lobe infiltrates. Serum calcium is 11.2 mg/dL (normal 8.5–10.5). ACE level is elevated at 68 U/L (normal <40). Transbronchial lung biopsy reveals non-caseating granulomas with multinucleated giant cells. Tuberculin skin test is negative. What is the most likely diagnosis?