One table as NDJSON (privacy.export_lines, FR-13.5): examples (those that still have their text, with their
provenance: teacher, license, license URL, hash, split, seen, redactions, clients), requests, versions (with
their BOMs as stored), events or erasures (with their items). Filters: task, split, since (epoch seconds or
an ISO 8601 date) and client, where the kind has them (400 otherwise). Needs an admin key, like the other
management calls. End-user hashes are left out; API keys are never stored.