Context:

As discussed with Operate and Zeebe, we want to adjust the take backup API success response to be a 202 with message "Backup creation for ID <backupId> has been scheduled. Use the GET API to monitor completion of backup process" in response body.

AT:

• take backup API ** returns 202 with message upon success
• confluence docs are adjusted
• user docs are adjusted

Testing notes:

• check that a successful take backup request returns a 202 with with message "Backup creation for ID <backupId> has been scheduled. Use the GET API to monitor completion of backup process"
• all other responses remain the same