Add annotations to pooler.yaml

Add annotations to pooler.yaml

```
metadata:
{{- with .Values.poolers.annotations }}
annotations:
{{- toYaml . | nindent 6 }}
{{- end }}
```

Open pooler.yaml and inspect the metadata section alongside the existing poolers annotations value. Add the requested annotation handling there, then render the Helm chart with pooler annotations configured and confirm they appear in the generated resource metadata.

Written by the indexing model from the issue text.