ingestion

Offline batch pipeline (never part of the live ai-service request path): extract -> segment -> chunk -> embed -> load. Parses data/raw/duoc-thu-quoc-gia-viet-nam-2018.pdf into per-drug, per-section chunks and upserts embeddings into Qdrant. Run via python -m ingestion.cli run --pdf data/raw/duoc-thu-quoc-gia-viet-nam-2018.pdf (once implemented).