GPU-first document extraction system

The GPU-first document extraction system includes the Docling extraction system as the mandatory method for DOCX and PPTX extraction. The GPU-first document extraction system uses the RTX 4000 GPU on the elin server for fast document extraction and vectorization. The theo backend server orchestrates the GPU-first document extraction system by triggering extraction and processing over SSH to elin GPU. Phase 2 GPU-First Document Extraction involves GPU-first document extraction as its core capability. GPU-first document extraction relies exclusively on Docling for DOCX and PPTX file extraction with no fallback options. GPU-first document extraction is performed using Docling on the elin GPU server. GPU-first document extraction uses the embedding service in backend/app/services/embedding_service.py which communicates with Ollama on the GPU for embeddings. GPU-first document extraction includes extracting DOCX files using backend/app/extractors/docx_extractor.py that calls Docling on elin GPU. GPU-first document extraction includes extracting PPTX files using backend/app/extractors/pptx_extractor.py that calls Docling on elin GPU. The GPU-first extraction system requires Ollama for generating embeddings on GPU using the nomic-embed-text embedding model to vectorize semantic chunks.