fix: type in workerinfo json

worker.go

@@ -9,9 +9,10 @@ import (
 	"context"
 	"errors"
 	"fmt"
-	"github.com/google/uuid"
 	"sync"
 	"time"
+
+	"github.com/google/uuid"
 )
 
 type WorkerStatus int
@@ -46,7 +47,7 @@ type Statistic struct {
 	JobsAssigned       int           `json:"jobsAssigned"`
 	JobsCompleted      int           `json:"jobsCompleted"`
 	FailedJobs         int           `json:"failedJobs"`
-	TotalExecutionTime time.Duration `json:"totalExecution_time"`
+	TotalExecutionTime time.Duration `json:"totalExecutionTime"`
 }
 
 func (s *Statistic) AverageExecutionTime() time.Duration {