How do I watch for new files in Google Drive and send them to Parabola?

const FOLDER_ID = 'YOUR_FOLDER_ID_HERE';       // Replace with your folder ID
const EMAIL = 'example@inbound.parabola.io';   // Replace with your flow's generated email address

function checkForNewFiles() {
  const props = PropertiesService.getScriptProperties();
  const lastChecked = props.getProperty('lastChecked');
  const now = new Date();

  // On first run, just record the time and exit
  if (!lastChecked) {
    props.setProperty('lastChecked', now.toISOString());
    Logger.log('First run — timestamp saved. New files after this will trigger emails.');
    return;
  }

  const folder = DriveApp.getFolderById(FOLDER_ID);
  const files = folder.getFiles();
  const lastCheckedDate = new Date(lastChecked);
  const newFiles = [];

  while (files.hasNext()) {
    const file = files.next();
    if (file.getDateCreated() > lastCheckedDate) {
      newFiles.push(file);
    }
  }

  if (newFiles.length > 0) {
    newFiles.forEach(file => sendEmailWithAttachment(file));
  }

  props.setProperty('lastChecked', now.toISOString());
}

function sendEmailWithAttachment(file) {
  const fileName = file.getName();
  const fileBlob = file.getBlob();

  GmailApp.sendEmail(
    EMAIL,
    `New file added: ${fileName}`,
    `A new file was added to your watched Google Drive folder.\n\nFile: ${fileName}\nAdded: ${file.getDateCreated()}`,
    {
      attachments: [fileBlob],
      name: 'Drive File Watcher'
    }
  );

  Logger.log(`Email sent for: ${fileName}`);
}