Quest PDF : Fix missing images for "determine species" questions

Helenarequested to merge
quest-pdf-fix-determine-species-imgs into dev

Summary by CodeRabbit

  • Bug Fixes
    • Improved image URL handling in PDF generation to support multiple formats (localhost, relative, deployed) and cached base64 images.
    • Enhanced inclusion of species-related quiz images when generating PDFs.
    • Extended image processing compatibility to additional domains.
Edited by coderabbit

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