Added missing associations for Event.
Delegating TimetableSlot conversion to EventFactory.
Primary key is required for #generate_events.
Added support for multiple matching_attributes in Sync.
Events are synced correctly.
Added semester and fetch_all parameters to UpdatedParallelsFinder.
Using ImportUpdatedParallels interactor in ScheduleManager.
Missing requires.
Increased default student pagination size.
Extracted faculty and semester as attributes.
Removed unused methods from ScheduleManager. Added import_students method.