A 62-year-old fair-skinned man from Delhi presents with a slowly enlarging nodule on the left cheek for 8 months. On examination, he has a pearly, translucent nodule with rolled edges and central ulceration. The lesion is firm, non-tender, and measures 1.5 cm. He has a history of prolonged sun exposure due to outdoor occupation. Dermoscopy reveals arborizing vessels and blue-gray ovoid nests. What is the most likely diagnosis?