Metrics for `notebook_create_total` and `notebook_running` are flipped

### Bug Description

Metrics for `notebook_create_total` and `notebook_running` are flipped.
I have 4 notebooks created and 2 running yet the `notebook_create_total` reports 2 and `notebook_running` reports 4.

```console
root@jupyter-controller-0:/var/lib/juju# curl -s localhost:8080/metrics | grep -i notebook_ | grep -Ei "create|running" | grep -v ^#
notebook_create_total{namespace="admin"} 2
notebook_running{namespace="admin"} 4
```


### To Reproduce

N/A

### Environment

CKF 1.8/stable (jupyter controller: `1.8/stable` , `824`)
Microk8s 1.24/stable
juju 3.1.6

### Relevant Log Output

```shell
N/A
```

### Additional Context

_No response_

Start by locating where the notebook_create_total and notebook_running metrics are defined and populated in the repository. Compare those paths with the reported notebook counts, then verify that the metrics output assigns each name to the correct value for created and running notebooks.

Written by the indexing model from the issue text.