A 62-year-old man presents with a sudden onset of severe pain, swelling, redness, and warmth in his right first metatarsophalangeal (MTP) joint (big toe). He woke up with the pain overnight. He has a history of hypertension treated with bendroflumethiazide and type 2 diabetes treated with metformin. On examination, the joint is exquisitely tender. What is the most likely diagnosis?