Fix PlacementDecision score field to use pointer type with omitempty

The Score field in ClusterDecision was defined as a bare int64 without omitempty, causing it to always serialize as score:0 even when unset. Change Score from int64 to *int64 with omitempty so the field is omitted from JSON when not explicitly set, consistent with other optional integer fields in the API (e.g. TolerationSeconds, NumberOfClusters).

Signed-off-by: Mike Ng <ming@redhat.com>

Author: mikeshng

cluster/v1beta1/types_placementdecision.go

@@ -61,7 +61,7 @@ type ClusterDecision struct {
 
 	// Score is the computed score for the cluster based on configured prioritizers
 	// +optional
-	Score int64 `json:"score"`
+	Score *int64 `json:"score,omitempty"`
 }
 
 // +k8s:deepcopy-gen:interfaces=k8s.io/apimachinery/pkg/runtime.Object