New pdf_extractor.py with extract_page_as_pdf() and extract_pages_as_pdf() for extracting individual PDF pages as separate files. Adds document_chunk_path setting to config and document_chunk/ to .gitignore.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Enhance extract_metadata() with three new optional fields for page-aware chunking support. Validates list length mismatches. Fully backward compatible — existing callers unaffected.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Add chunk_pages() to TokenChunkingStrategy: one chunk per page with 200-token overlap from adjacent pages. Uses original page text for main content, decoded tokens for overlap. Never splits a page regardless of size.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Add parse_pdf_by_page() that returns List[Tuple[int, str]] with 1-indexed page numbers. Pages with no extractable text are skipped. Follows same error handling as existing parse_pdf().
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
When uploading files, the backend passes them through NamedTemporaryFile, causing os.path.basename to return temp names like 'tmp90i7xqa8.pdf'. Added original_filename parameter to extract_metadata() so the actual upload filename is stored.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
Woody