python-pptx

Docling extraction conflicts with python-pptx as fallback for PPTX extraction; python-pptx was removed as fallback is disallowed. The PPTX extractor implementation is based on python-pptx for slide and text extraction with semantic chunking. The PPTX extractor uses the python-pptx third-party component. The PPTX extractor uses python-pptx to extract slide-based chunks during DataLens Phase 2.