CollectionEvent class

Event management system for database collection operations.

This class provides event handling capabilities for database operations, allowing you to register listeners that are called when documents are inserted, updated, or deleted from a collection.

Each event type supports both synchronous and asynchronous listeners, making it flexible for various use cases such as:

• Logging database operations
• Triggering side effects (like sending notifications)
• Maintaining data consistency across related collections
• Caching updates

Example:

collection.collectionEvent.onInsert.addListener((document) {
  print('New document inserted: ${document['_id']}');
});

collection.collectionEvent.onUpdate.addAsyncListener((document) async {
  await updateSearchIndex(document);
});