feat(service): add task defaults, job status, and cluster helpers

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/service/cluster_service.go

@@ -26,6 +26,8 @@ func derefInt32(i *int32) int32 {
 	return *i
 }
 
+func int32Ptr(i int32) *int32 { return &i }
+
 func derefInt64(i *int64) int64 {
 	if i == nil {
 		return 0
@@ -33,6 +35,13 @@ func derefInt64(i *int64) int64 {
 	return *i
 }
 
+func derefInt32ToStr(i *int32) string {
+	if i == nil {
+		return ""
+	}
+	return strconv.FormatInt(int64(*i), 10)
+}
+
 func uint32NoValString(v *slurm.Uint32NoVal) string {
 	if v == nil {
 		return ""