Changes:
- Remove PDF caching to ensure code changes take effect
- Add PDF rotation handling (90/270 degree swap)
- Add dict bbox format support for UnifiedDocument
- Use Paragraph objects for table cells to enable text auto-wrapping
- Align OCR track table rendering logic with Direct track (no fixed rowHeights)
Known issue: PP-StructureV3 does not provide cell bbox in output
(block_content only contains HTML string, no res['boxes'] like old PPStructure)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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