What is the purpose of setting `waitUntil: 'networkidle0'` in Puppeteer, and how does it relate to Cloudflare 403 errors?

`waitUntil: 'networkidle0'` tells Puppeteer to wait until there are no more network connections for at least 500ms. This ensures that all JavaScript, including Cloudflare's challenges, has had a chance to execute before Puppeteer attempts to scrape the page. However, it can sometimes be too aggressive and cause timeouts; consider using `'domcontentloaded'` or `'load'` as alternatives if necessary.