A 35-year-old male construction worker from Mumbai presents with a 3-week history of progressive swelling and pain over the right tibia following a puncture wound to the sole of his foot with a contaminated nail. On examination, there is localized warmth, erythema, and a draining sinus tract over the medial aspect of the tibia. His temperature is 38.2°C. Laboratory investigations show WBC 14,500/μL, ESR 68 mm/hr, and CRP 12.5 mg/dL. Plain radiographs of the tibia show periosteal reaction and early bone destruction. Blood culture is pending. Which organism is most likely responsible for this clinical presentation?