Batch Convert 12,000 Files to PDF with Cut Contour and Cut Out Knife Lines

Hi everyone,

For our business, we need to convert approximately 12,000 files (in various formats) into PDFs. In each PDF, we need to add a Cut Contour line and a Cut Out Knife line.

Is there a way to automate this process for all 12,000 files without having to open and edit each file individually? Any advice on how to handle this efficiently would be greatly appreciated!

Thanks in advance for your help!