Shelving this for now. Added relevant Q objects, changed classreg values, added test info.
Merge branch 'main' into ticket-1257
Merge branch 'main' into ticket-1257
Merge branch 'main' into ticket-1257
Adds students with SSI to students()['classreg'], which is "Students who signed up for at least one class" on the dashboard
Force Django to generate separate queries for sr and ssi
Merge pull request #1492 from learning-unlimited/ticket-1257

Ticket 1257