Getter method for RabbitStreamTemplate for the loaded Stream

Today the 'streamName' is in the constructor and sets as a final variable 'streamName'

have a getter method for the loaded stream.

workaround is to create a holder class or use contants

 record RabbitStreamTemplateHolder(RabbitStreamTemplate template, String streamName) {

    }

this causing issues when 'streamName' variable is needed in another stage rather than initalization.