A 7-year-old girl from rural Rajasthan presents with chronic bilateral eye discharge and mild photophobia for the past 8 months. On examination, she has conjunctival injection, upper tarsal papillae, and Arlt's line is noted. Giemsa staining of conjunctival scrapings reveals intracytoplasmic inclusion bodies in epithelial cells. What is the most likely diagnosis and the causative organism?