Create the initial Helm chart with core templates that cover the minimum viable installation: CRD, ServiceAccount, RBAC (manager, leader election, metrics), Deployment, and Metrics Service.

The chart should produce the same resources as the current kustomize deployment when using default values. All existing kustomize resources under config/ serve as the source of truth.

helm lint and helm template should pass, and helm install on a Kind cluster should successfully deploy the operator.