refactor: restructure main function and setInterval for better readability and execution flow

index.js

@@ -26,8 +26,7 @@ async function getTimetabe() {
   return timetable;
 }
 
-
-setInterval(async () => {
+async function main() {
   const timetable = await getTimetabe();
 
   if (!timetable || timetable.length === 0) {
@@ -138,5 +137,10 @@ setInterval(async () => {
   }
 
   console.log(`✅ Sync done — Created: ${created}, Updated: ${updated}, Skipped: ${skipped}`);
+}
 
+main();
+
+setInterval(async () => {
+  await main();
 }, 1000 * 60 * 30); // Alle 30 Minuten aktualisieren