The Interval field default is not correctly applied in SylvaUnitsReleaseSpec

The CRD defines the Interval fields as

// Interval at which the FluxCD resources are reconciled
// +kubebuilder:validation:Type=string
// +kubebuilder:validation:Pattern="^([0-9]+(\\.[0-9]+)?(ms|s|m|h))+$"
// +kubebuilder:default="30m"
// +optional
Interval metav1.Duration `json:"interval"`

However, when left unset like in this example

By("Creating empty SylvaUnitsRelease"Template"")
sylvaUnitsRelease := &surv1alpha1.SylvaUnitsRelease{
  ObjectMeta: metav1.ObjectMeta{
    Name:      "sur1",
    Namespace: "default",
  },
  Spec: surv1alpha1.SylvaUnitsReleaseSpec{
    ClusterType: surv1alpha1.WorkloadClusterType,
    SylvaUnitsSource: &surv1alpha1.SylvaUnitsSource{
      Type: "git",
      URL:  "https://bob.io",
      Tag:  "dummy",
    },
  },
 }
truc, _ := json.Marshal(sylvaUnitsRelease)
fmt.Println(string(truc))
Expect(k8sClient.Create(ctx, sylvaUnitsRelease)).Should(Succeed())
			
By("Checking that default values are set")
Eventually(func(g Gomega) {g.Expect(k8sClient.Get(ctx, client.ObjectKeyFromObject(sylvaUnitsRelease), sylvaUnitsRelease)).To(Succeed())}, timeout, interval).Should(Succeed())
truc, _ = json.Marshal(sylvaUnitsRelease)
fmt.Println(string(truc))

The printed values are

{"metadata":{"name":"sur1","namespace":"default","creationTimestamp":null},"spec":{"clusterType":"workload","sylvaUnitsSource":{"type":"git","url":"https://bob.io","tag":"dummy"},"interval":"0s"},"status":{"helmReleaseStatus":{}}}
{"metadata":{"name":"sur1","namespace":"default","uid":"472d5deb-e059-4134-8905-877d2f3e0b3a","resourceVersion":"233","generation":1,"creationTimestamp":"2025-11-13T13:39:02Z","managedFields":[{"manager":"controller.test","operation":"Update","apiVersion":"unitsoperator.sylva/v1alpha1","time":"2025-11-13T13:39:02Z","fieldsType":"FieldsV1","fieldsV1":{"f:spec":{".":{},"f:clusterType":{},"f:interval":{},"f:suspend":{},"f:sylvaUnitsSource":{".":{},"f:tag":{},"f:type":{},"f:url":{}}}}}]},"spec":{"clusterType":"workload","sylvaUnitsSource":{"type":"git","url":"https://bob.io","tag":"dummy"},"interval":"0s"},"status":{"observedGeneration":-1,"helmReleaseStatus":{}}}

Therefore, the default values is not 30m as expected, but 0s