feat: accept PDF uploads (rasterize to per-page images, then process)

POST /v1/sessions now accepts PDFs alongside images. A PDF is rasterized with poppler (pdftoppm) into one PNG per page, expanded in submitted order, then run through the normal single-pass pipeline. Page count is capped per deployment; oversized PDFs return a clean 400. Adds poppler-utils to the Docker image, a multer size limit with graceful errors, and updates the demo file picker to accept application/pdf. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Blake Bertuccelli-Booth committed on May 22, 2026, 07:42 PM

Showing 6 changed files +124 additions -19 deletions

M Dockerfile +4 -3

M README.md +3 -1

M docs/API.md +3 -1

M public/demo.html +3 -3

M src/routes/sessions.ts +55 -11

A src/util/pdf.ts +56