Rabbitmq enable metrics

Set up the monitoring stack to collect metrics from rabbitmq. Current config:

```yaml
metrics:
  enabled: true
  podAnnotations:
    prometheus.io/scrape: "true"
    prometheus.io/path: /metrics
    prometheus.io/port: "8080"
```

**Tasks:**

* [ ] Ensure Prometheus is scraping metrics from the namespace
* [ ] Verify metrics appear in the monitoring dashboard
* [ ] Finalize and commit the config
