A maintenance script needs to be created that allows scanning of images in the `uploadstash` table. This script should read rows from the `uploadstash` table, process them and then add them to the `mediamoderation_scan` table with a match result included. This should meet the following requirements:
* This script should add the SHA-1 to the `mediamoderation_scan` table on a successful scan with the associated match status
* This script should appropriately handle errors, including if the rate-limit is reached.
* This script should email to a specified email address if a file is determined to be a match (T351407)
Files in the `uploadstash` table are not yet "uploaded" to the wiki, so a row for the SHA-1 of the image may not exist in the `mediamoderation_scan` table. This table is purged by default after 6 hours (21600 seconds), however, on `commonswiki` and `testcommonswiki` this is 48 hours ([[ https://gerrit.wikimedia.org/g/operations/mediawiki-config/+/372ce0fe7aeb0ebb9a7a6e1a874f951da82041f6/wmf-config/InitialiseSettings.php#725 | relevant config]]).
=====Acceptance criteria
[] Create a maintenance script that scans images in the uploadstash table
[] Properly test this script for reliability