style(LogsView): update success log background color for scheduler runs

- Changed the background color for successful scheduler runs (status 200) from yellow to green for better visibility and user experience.

frontend/src/views/LogsView.vue

@@ -645,6 +645,11 @@ export default {
   background: #fefce8;
 }
 
+/* Erfolgreiche Scheduler-Läufe (Status 200) sollen grün sein, nicht gelb */
+.log-scheduler.log-success {
+  background: #f0fdf4;
+}
+
 .log-type-badge {
   display: inline-block;
   padding: 0.25rem 0.5rem;