Introduce bulk entity events

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

consider this scenario:
you have a separate algolia search server, and you want to sync data between your database and the algolia index.

the current solution is to implement ILocalEventHandler<EntityChangedEventData<TEntity>>.
this works when only a single entity is getting changed, but not for InsertMany,UpdateMany,DeleteMany since they will introduce the N+1 problem

Describe the solution you'd like

I suggest that new events to get introduced:

• IBulkEntityChangeEventHelper

    public interface IBulkEntityChangeEventHelper
    {
        void PublishEntityCreatedEvent(IEnumerable<object> entity);
  
        void PublishEntityUpdatedEvent(IEnumerable<object> entity);
  
        void PublishEntityDeletedEvent(IEnumerable<object> entity);
    }
  

• BulkEntityEventData -> contains a list of entities
• BulkEntityChangedEventData -> fired when many entities are changed
• BulkEntityCreatedEventData -> fired when many entities are created
• BulkEntityUpdatedEventData -> fired when many entities are updated
• BulkEntityDeletedEventData -> fired when many entities are deleted

and then we can add a configuration for users to override the behavior of InsertMany, UpdateMany,DeleteMany to control whether the old events EntityChangedEventData are fired alongside the new bulk ones or not

Additional context

No response

Start by locating the InsertMany, UpdateMany, and DeleteMany entry points and the existing EntityChangedEventData flow. Review how the proposed IBulkEntityChangeEventHelper and bulk event data types would integrate with those operations. Done means bulk events avoid the N+1 problem and configuration clearly defines whether the existing single-entity events are also published.