Function arecord_label_selector 

pub fn arecord_label_selector(
    cluster: &str,
    namespace: &str,
    ingress_name: &str,
) -> String

Builds a Kubernetes label selector string matching all ARecords created by Scout for a specific Ingress.

Selects on managed-by=scout, source-cluster, source-namespace, and source-ingress to precisely target only the records owned by this Ingress.