Lists the loan files on your processing company's account, as short
summary rows rather than the full detail of each one.

Archived files are left out unless you pass include_archived=true.
You can narrow the list by broker, borrower, or loan officer, and
walk through it with page and per_page.

Rows are ordered by loan-file id, highest first, and that order is
stable across pages — page 2 continues below page 1 with no overlap.
The most recently created file is therefore the first row of page 1,
so finding it takes one request rather than a walk of every page.
There is no sort parameter; this is the only ordering available.

createdAt is not the sort key and can disagree with it: a file whose
createdAt holds an earlier date than the row beneath it still sorts
by its id. To order by date, read createdAt from the rows.