On a Monday spared the rains that drenched most of December, Jeffrey Dupra picked me up at The Union’s office on his way into Nevada City in a small SUV full of winter coats. As the outreach worker for Hospitality House, the county’s largest homeless service provider, Dupra had spent the morning with a client’s father deliberating his son’s mental health emergency — a responsibility that kept Dupra from attending a meeting with police from Grass Valley, Nevada City and Nevada County to discuss homelessness. Dupra prefers to start his days at Hospitality House’s Welcome Center on South Church Street …