Website crawl
The public site as the agency and client already maintain it. Best for hours, services, and FAQs that belong on a URL.
Files
PDFs and documents that are not (or not yet) a page: internal policies, menus, terms. They still need approval. A forgotten price list in a PDF will be treated as truth.
Catalogues
Do not pretend a product CSV is “knowledge”. Connect the store and keep policies in the knowledge lane.