initialized with a season, i.e. "2024-25 Fall". Update scapers for
admin data, enrollment and staffing to use the new range standard
correctly. Update the loaders for admin data, enrollment and staffing
so that it populates all seasons in a given year. So admin data for
2024-25 gets loaded into "2024-25 Fall" and "2024-25 Spring". Add tests
for the new range format. Set the default cutoff for the start of Spring season will be the last Sunday in February
