refactor: Use UnixMilli for slurm job times

* Grafana expects a millisecond epoch for to and from query params

Signed-off-by: Mahendra Paipuri <[email protected]>

pkg/jobstats/helper/helper.go

@@ -127,7 +127,7 @@ func NodelistParser(nodelistExp string) []string {
 // Converts a date in a given layout to unix timestamp of the date
 func TimeToTimestamp(layout string, date string) int64 {
 	if t, err := time.Parse(layout, date); err == nil {
-		return int64(t.Local().Unix())
+		return int64(t.Local().UnixMilli())
 	}
 	return 0
 }