Performance issue in consent event executor

[aka4rKO]

Description:
With the fixing of a metrics issue related to the recipientCount[1] not updating as expected with the PR[2], it introduces a performance hit as during a business user consent creation when there are multiple users to create authorization resources. We have solved the issue[1] by invoking the DB to retrieve the detailed consent resource to identify the primary user.

However this has an impact on the performance since when there are multiple users this DB call is invoked multiple times.

We need to find a way optimize this solution without breaking the functionality

[1] OB Internal 934
[2] wso2/reference-implementation-consumerdatastandards-au#57

Steps to reproduce:

1. Enable data publishing
2. Create a business user consent while debugging the CDSConsentEventExecutor.processEvent method