Implement k8s instance retrieval

src/servala/core/models/service.py

@@ -564,3 +564,23 @@ class ServiceInstance(ServalaModelMixin, models.Model):
                     raise ValidationError(_("Kubernetes API error: {}").format(str(e)))
             raise ValidationError(_("Error creating instance: {}").format(str(e)))
         return instance
+
+    @cached_property
+    def kubernetes_object(self):
+        """Fetch the Kubernetes custom resource object"""
+        try:
+            api_instance = client.CustomObjectsApi(
+                self.context.control_plane.get_kubernetes_client()
+            )
+
+            return api_instance.get_namespaced_custom_object(
+                group=self.context.group,
+                version=self.context.version,
+                namespace=self.organization.namespace,
+                plural=self.context.kind_plural,
+                name=self.name,
+            )
+        except ApiException as e:
+            if e.status == 404:
+                return None
+            raise