make a proper -owide kubectl output

current state:

```
$ kubectl get objectstore -A
NAMESPACE NAME AGE
keycloak keycloak 20h
postgresql quizservicedb 29m
```

But if I would invoke the kubectl get -oyaml I see additional information in status field like:

```
status:
serverRecoveryWindow:
quizservicedb: {}
```

I would like to get additional columns in `kubectl get` command output which would give me more understanding about the status of objectstore - does it work, are the credentials correct etc. Maybe the last database backup timestamp.

Start by comparing the current `kubectl get objectstore -A` output with the fields shown by `kubectl get -oyaml`, especially the status information. Determine which status indicators and backup timestamp should become columns, then verify that the objectstore output exposes them clearly and consistently.

Written by the indexing model from the issue text.