SAN DIEGO — The migrant girl was around 6 years old, dehydrated, fluish and despondent. Her head looked too big for her body — a sign of malnutrition — and she had lice in her hair. The girl had spent two weeks outdoors held at the sunbaked Border Patrol detention center in El Paso with her asylum-seeking family before being brought to a migrant shelter in San Diego. That’s where Jenn Budd found her in the summer of 2018, and she needed serious medical intervention. It was Budd’s first time as a volunteer at the shelter. Still, another volunteer commented, “You’re probably used to seeing this….