Get the latest licensed bulk snapshot manifest.

Returns a manifest describing the most recent bulk snapshot and a signed, expiring URL to download it. The snapshot is cut from the same served corpus as the paged endpoints and carries the same provenance boundary: only rows Veridion collected first-party from the government system of record are included. This endpoint requires a bearer key and has no anonymous mode, and that key must carry the read:export scope. That scope is a separately quoted add-on rather than part of any tier's default grant, so a valid key for every other documented path still receives 403 here. Accepts no query parameters.