[executor] fix lint issues

Author: capcom6

internal/worker/executor/metrics.go

@@ -26,16 +26,19 @@ func newMetrics() *metrics {
 			Namespace: "worker",
 			Subsystem: "executor",
 			Name:      "active_tasks",
+			Help:      "Number of active tasks",
 		}),
 		taskResult: promauto.NewCounterVec(prometheus.CounterOpts{
 			Namespace: "worker",
 			Subsystem: "executor",
 			Name:      "task_result_total",
+			Help:      "Task result, labeled by task name and result",
 		}, []string{"task", "result"}),
 		taskDuration: promauto.NewHistogramVec(prometheus.HistogramOpts{
 			Namespace: "worker",
 			Subsystem: "executor",
 			Name:      "task_duration_seconds",
+			Help:      "Task duration in seconds",
 			Buckets:   []float64{.001, .005, .01, .025, .05, .1, .25, .5, 1, 2.5, 5, 10},
 		}, []string{"task"}),
 	}

internal/worker/executor/service.go

@@ -69,6 +69,7 @@ func (s *Service) Start() error {
 }
 
 func (s *Service) runTask(ctx context.Context, task PeriodicTask) {
+	//nolint:gosec // it's ok
 	initialDelay := time.Duration(math.Floor(rand.Float64()*task.Interval().Seconds())) * time.Second
 
 	s.logger.Info("initial delay", zap.String("name", task.Name()), zap.Duration("delay", initialDelay))