fix: Build-Fehler behoben (Import + Buffer Type)

app/api/cron/process-pending-bookings/route.ts

@@ -2,7 +2,7 @@ import { NextRequest, NextResponse } from 'next/server';
 import { prisma } from '@/lib/prisma';
 import { AIService } from '@/lib/ai-service';
 import { LexOfficeService } from '@/lib/lexoffice';
-import { getCalendarService } from '@/lib/nextcloud-calendar';
+import { nextcloudCalendar } from '@/lib/nextcloud-calendar';
 
 /**
  * AUTO-WORKFLOW CRON-JOB
@@ -48,7 +48,7 @@ export async function GET(request: NextRequest) {
 
     const aiService = new AIService();
     const lexoffice = new LexOfficeService();
-    const calendar = getCalendarService();
+    const calendar = nextcloudCalendar;
 
     let processed = 0;
     let errors = 0;