A financial assistant must answer both policy questions from documents and numerical questions from governed tables. Which design best separates the two kinds of evidence?

1. Embed all numeric cells and infer every total from approximate nearest neighbors.
2. Fine-tune a model once and stop querying enterprise sources.
3. Use only policy PDFs and ask the model to estimate missing financial totals.
4. Route document questions to retrieval and numerical questions to an authorized structured-data tool.