Iryna Sakhariieva, who fled Ukraine after the Russian invasion in 2022, can continue her vocation as a vocal teacher, a role she held in her home country. She is teaching students a Ukrainian song. (Photos: Paula Katinas) BRIGHTON BEACH — When Iryna Sakhariieva and her family fled Ukraine after the Russian invasion in 2022, they left everything behind, including Sakhariieva’s career as a music teacher. Four years later, they have planted new roo…