PDF space export stuck at 50% when falling back to previous PDF export service

Issue Summary

• If a Space has over 2000 (current limit) pages, it falls back to the older PDF export service.
• This service fails to export the Space if there's ~1000+ attachments, and hangs the export at 50%.

Steps to Reproduce

• Navigate to space with more than 1000 attachments.
• Perform a Full PDF export.

Expected Results

• Export finished successfully.

Actual Results

• The export falls back to the older PDF export service as there's more than 1k content in the Space.
• Export stuck at 50 % with the message Begin conversion of Intermediate HTML to PDF.

Workaround

• Perform a custom export with a minimal number of pages to reduce the number of attachments in the export file.
  • When trying the custom export, please export the Restricted pages separately, as these pages will not be added to the export.