fix: replace deprecated diffInRealMilliseconds with diffInUTCMilliseconds

Replace Carbon's deprecated diffInRealMilliseconds method with
diffInUTCMilliseconds in RecordJobFailure and RecordJobSuccess listeners.
The new method name is more explicit about converting both dates to UTC
before comparison, ensuring accurate duration calculations regardless
of timezone differences.

Author: houdaslassi

src/Listeners/RecordJobFailure.php

@@ -89,7 +89,7 @@ public function handle(JobFailed $event): void
             $row->stack = Str::limit($event->exception->getTraceAsString(), 4000);
             $row->finished_at = now();
             if ($row->started_at) {
-                $duration = $row->finished_at->diffInRealMilliseconds($row->started_at, true);
+                $duration = $row->finished_at->diffInUTCMilliseconds($row->started_at, true);
                 $row->duration_ms = max(0, (int) $duration);
             }
             // Telemetry end metrics

src/Listeners/RecordJobSuccess.php

@@ -93,7 +93,7 @@ public function handle(JobProcessed $event): void
             $row->status = 'processed';
             $row->finished_at = now();
             if ($row->started_at) {
-                $duration = $row->finished_at->diffInRealMilliseconds($row->started_at, true);
+                $duration = $row->finished_at->diffInUTCMilliseconds($row->started_at, true);
                 $row->duration_ms = max(0, (int) $duration);
             }