Grant document deep-read

Fetching a grant's real solicitation document and extracting its evidence-backed requirements.

For a grant, the deep-read finds the actual solicitation (for an NIH opportunity it resolves the funding announcement from the grants.gov number and drops portal pages), fetches it, stores the full text, and extracts requirements each tied to a quoted piece of the document. The extraction runs as an observable Agent Studio run, one node run per chunk of the document. New grants are enqueued automatically.