Possible values of status field in "com.oraclecloud.blockvolumes.createbootvolumebackup.end" event

Summary:

We are trying to leverage OCI Events to get notified when a boot volume backup has failed. We would like to know what are the possible values status field in "com.oraclecloud.blockvolumes.createbootvolumebackup.end" event could take, so that we can created filters based on them.

We would also like to know how we can define filters mentioned in the document https://docs.oracle.com/en-us/iaas/Content/Events/Concepts/filterevents.htm#PayloadSamples as the console doesn't provide all the attributes.

Is there a way we can define filters based on negation. example: "status": Not "operationSucceed"

Content (required):