API-25894 Save Benefits Intake file sizes

[caseywilliams]

Summary

• Adds the file size (in bytes) of all PDFs (main content and attachments) uploaded via the Benefits Intake API to the set of saved metadata JSON

Related issue(s)

• API-25984

Testing done

• Updated specs

What areas of the site does it impact?

• Starts including the file sizes of uploaded content and attachments in the saved JSON metadata for VBADocuments::UploadSubmissions alongside the checksum, page dimensions, etc.

Acceptance criteria

• I fixed|updated|added unit tests and integration tests for each feature (if applicable).
• No error nor warning in the console.
• Events are being sent to the appropriate logging solution
• Documentation has been updated (link to documentation)
• No sensitive information (i.e. PII/credentials/internal URLs/etc.) is captured in logging, hardcoded, or specs
• Feature/bug has a monitor built into Datadog or Grafana (if applicable)
• If app impacted requires authentication, did you login to a local build and verify all authenticated routes work as expected
• I added a screenshot of the developed feature

[caseywilliams]

pdfinfo outputs a File size string value formatted like "12040 bytes", for example

[kristen-brown]

Nice! Looks good to me.