The future of healthcare is what staff at Boston Senior Medicine thought they were signing up for, but now they have gone without paychecks and worried patients aren’t getting the care they need. The Canton-based home-health business aims to bring primary care directly to the homes of senior patients. “We can really help people, we can go right into their homes and we can bring primary care to them. This is a game changer,” said Randy Veraguas, a former Boston Senior Medicine employee. At least, that’s what Veraguas thought when he joined the business in 2020 to head its marketing…