When Two npm Packages Fight Over pdfjs-dist: Drop to System Binaries

Adding OCR for scanned PDFs in a Next.js app caused a hidden pdfjs-dist version conflict between pdf-to-img and unpdf, which both bundle incompatible versions of PDF.js internally. After exploring several JavaScript alternatives that all had similar issues, the author resolved it by dropping the JS PDF-rasterization library entirely and shelling out to system-level binaries like poppler-utils and Tesseract.