Pdf merger

[burkkyy]

Context

Attachments in an archive item need to all be converted, merged and then signed into a single pdf ready for file store upload

Implementation

• simplified pdf signer to take in a buffer and return a buffer
• Archiver attachments are queue for pdf conversion via upload to a cache
• In pdf converter job once all attachments are converted to a pdf, the archive is queued for merge
• In archive item upload job all pdfs in archive item are merged into one pdf, signed, then uploaded (UPLOAD TODO)

Testing Instructions

1. Boot the app via dev up
2. Log in to the app at http://localhost:8080
3. Go to create archive item page at http://localhost:8080/archive-items/new
4. Add an arbitrary number of files (not a binary) to the attachment, then save the archive item
5. Wait for PDF converter job to run and finish
6. Check redis cache for PENDING_FILESTORE_UPLOAD_ARCHIVE_ITEM_ID_
7. Wait for archive item upload job to run and finish

[burkkyy]

Where on the file store should the merged(and signed) pdf go?

[burkkyy]

Does the file record need to be updated? Or does the filestore only care about the merged pdf?