New OCR method using classical Computer Vision: high-res rendering (432 DPI), deskew, dewarp, binarization, projection-profile layout analysis, multi-pass Tesseract OCR with region-specific PSM, and Y-coordinate line alignment. Includes bugfix for convert_pdf_to_image call (line 869) and 39 unit tests. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>