Deletes multiple events efficiently in a single request.

What this endpoint does:

• Deletes multiple events and all their associations (students, professors)
• Automatically sends deletion notifications to previously associated students

Automatic behaviors:

• Cascade deletion: Removes all student and professor associations automatically
• Smart notifications: Students get notified only for events happening within the next 3 days
• Error handling: Non-existent event IDs are silently ignored

Notification details: Students receive push notifications with event name, date, and time for upcoming deleted events.

Note: This operation cannot be undone. Make sure you really want to delete these events.