Fix EnhancedCalendar.getEventsInRange breaking parent API contract

[thedhanawada]

Bug

EnhancedCalendar.getEventsInRange() overrides the parent Calendar.getEventsInRange() and changes the return type from synchronous Event[] to async plain objects. This is a Liskov Substitution violation — callers expecting the parent API get broken behavior.

Expected

Maintain the same return type and behavior as the parent class. If async is needed, use a different method name.

Location

core/integration/EnhancedCalendar.js