Zabbix Feature check

Hello, I'm jackson and i'm Zabbix Partner in korea.

I need a to checklist for introducing zabbix to customer.

1. We have confirmed that the DB to which zabbix will be connected states "ElasticSearch will also be available."

At this time, I wonder when the exact release date for EleasticSearch is and what formats support EleasticSearch.

1. It is necessary to check if a separate custom type can be added from the medium type of Zabbix. For example, in the case of a client messenger, we use our own messenger, but we need to check if we can use it by linking this messenger with Zabbix. I wonder if it is possible to provide a guideline.