Currently, when pages of documents are requested from the API, the
webserver logs a warning:
```
gunicorn[1550]: /home/madduck/code/paperless-ngx/.direnv/python-3.11.2/lib/python3.11/site-packages/rest_framework/pagination.py:200: UnorderedObjectListWarning: Pagination may yield inconsistent results with an unordered object_list: <class 'documents.models.Document'> QuerySet.
```
This can yield unexpected and problematic results, including duplicate
and missing IDs in the enumeration, as demonstrated in
https://github.com/paperless-ngx/paperless-ngx/discussions/6859
The patch is simple: turn the unordered Documents QuerySet into
one that's ordered by reverse creation date, which is the default
ordering for `Document`.
Note that the default ordering for `Document` means that
`QuerySet.ordered` is actually `True` following the call to
`distinct()`, but after `annotate()`, the flag changes to `False`,
unless `order_by()` is used explicitly, as per this patch.
Closes: https://github.com/paperless-ngx/paperless-ngx/discussions/6859
Signed-off-by: martin f. krafft <madduck@madduck.net>