fix: don't run cron on schedule

need to explicitly start the cron to support multiple replicase (leader
election).

This way multiple replicas can register the job without starting it and
let the leader election start/stop the cron schedulers.

job/job.go

@@ -272,7 +272,8 @@ func (j *JobRuntime) end() {
 	j.Job.statusRing.Add(j.History)
 
 	j.Context.Counter("job", "name", j.Job.Name, "id", j.Job.ResourceID, "resource", j.Job.ResourceType, "status", j.History.Status).Add(1)
-	j.Context.Histogram("job_duration", context.LongLatencyBuckets, "name", j.Job.Name, "id", j.Job.ResourceID, "resource", j.Job.ResourceType, "status", j.History.Status).Since(j.History.TimeStart)
+	j.Context.Histogram("job_duration", context.LongLatencyBuckets, "name", j.Job.Name, "id", j.Job.ResourceID, "resource", j.Job.ResourceType, "status", j.History.Status).
+		Since(j.History.TimeStart)
 }
 
 func (j *JobRuntime) Failf(message string, args ...interface{}) {
@@ -562,7 +563,6 @@ func (j *Job) GetResourcedName() string {
 
 func (j *Job) AddToScheduler(cronRunner *cron.Cron) error {
 	echo.RegisterCron(cronRunner)
-	cronRunner.Start()
 
 	schedule := j.Schedule
 	if override, ok := j.GetProperty("schedule"); ok {