Fix: Timetracking ordre generering brugte execute_query_single i stedet for execute_query

app/timetracking/backend/order_service.py

@@ -108,7 +108,7 @@ class OrderService:
                   AND t.billable = true
                 ORDER BY c.id, t.worked_date
             """
-            approved_times = execute_query_single(query, (customer_id,))
+            approved_times = execute_query(query, (customer_id,))
             
             if not approved_times:
                 raise HTTPException(