Renders a 240px-wide JPEG (quality 85) from either a PDF first page
via PDFBox or a JPEG/PNG/TIFF scan via ImageIO, then uploads to
S3 under thumbnails/{docId}.jpg and updates the Document entity.
Scaling uses Graphics2D.drawImage with VALUE_INTERPOLATION_BILINEAR
(not deprecated Image.getScaledInstance). Source is streamed via
FileService.downloadFileStream to avoid buffering 50MB PDFs.
Never throws — returns Outcome.SKIPPED for unsupported content types
and Outcome.FAILED for rendering/upload errors so the backfill can
tally them without aborting the run.
Refs #307
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
955c497ba0