It is the first of two parts on the upgraded pipeline: this part upgrades each brick, one contract at a time, on the same paper and the same question as Article 1 (minimal RAG). The second part, Composing the four RAG bricks into one pipeline, tested on real documents (link to come), wires them into one call and runs it on several real documents. 📓 Runnable companion notebooks are on GitHub: doc-...