Added FOCUS-55867 - Stop default_value from defaulting to first select option for Custom Fields migration (FOCUS-53916)

Removed FOCUS-55661 - students.deleted

This branch removes the legacy students.deleted column from environments where it still exists. The migration safely drops dependent views, removes the column, rebuilds affected views, and clears the schema cache to maintain system consistency.

Added FOCUS-55932 - Rollover Scheduled job - set enrollment defaults