Massachusetts taxpayers are facing an eye-popping $1 billion bill for the state's emergency shelter program in FY25, largely due to the surge of migrant families benefiting from these services. Governor Maura Healey's administration has already shelled out a staggering $830 million since the fiscal year began on July 1, providing taxpayer-funded shelter, food, education, legal aid, and case management to over 4,000 families…