- Add 5-stage pipeline: Extract → Rule-Refine → LLM-Refine → Chunk → Enrich
- Integrate Unpdf 0.1.5 for PDF processing (text + image extraction)
- Integrate Undoc 0.1.12 for Office documents (DOCX, XLSX, PPTX)
- Integrate Unhwp 0.1.13 for Korean documents (HWP, HWPX)
- Remove PdfPig dependency completely (replaced by Unpdf)
- Remove DocumentFormat.OpenXml, Mammoth, ReverseMarkdown (replaced by Undoc)
- Add ILlmRefiner interface and LlmRefiner implementation
- Migrate MultiModalPdfDocumentReader to Unpdf for image extraction
- Update README and CHANGELOG for v0.10.0