A 34-year-old woman with poorly controlled type 2 diabetes mellitus (HbA1c 11.2%) presents with vulvovaginal itching, burning, and thick white vaginal discharge for 2 weeks. She denies fever or abdominal pain. On speculum examination, thick white plaques are seen adherent to the vaginal mucosa. Wet mount microscopy shows budding yeast and pseudohyphae. Culture on Sabouraud dextrose agar at 37°C grows white, creamy colonies. The isolate ferments glucose and maltose but not trehalose or lactose. What is the most likely causative organism?