Change 974187 had a related patch set uploaded (by Dreamy Jazz; author: Dreamy Jazz):

[mediawiki/extensions/MediaModeration@master] [WIP] Add images to mediamoderation_scan table on upload

https://gerrit.wikimedia.org/r/974187

Change 974187 merged by jenkins-bot:

[mediawiki/extensions/MediaModeration@master] Add images to mediamoderation_scan table on upload

https://gerrit.wikimedia.org/r/974187

Suggested QA steps:

1. Install MediaModeration and run update.php
2. Go to Special:Upload
3. Upload a test file that is a png, gif or jpeg
4. Using the following query, get the SHA-1 of the file (in base 36) from the database:

SELECT img_sha1 FROM image WHERE img_name = <filename of the file without the "File:" prefix but with the file extension>;

5. Inspect the mediamoderation_scan table and verify that a row has been added with the SHA-1 of the file:

SELECT * FROM mediamoderation_scan WHERE mms_sha1 = <value of img_sha1>;

+---------------------------------+------------------+--------------+
| mms_sha1                        | mms_last_checked | mms_is_match |
+---------------------------------+------------------+--------------+
| <value of img_sha1>             |             NULL |         NULL |
+---------------------------------+------------------+--------------+
1 row in set (0.003 sec)

6. Add $wgFileExtensions[] = 'mdi'; to your LocalSettings.php (not needed if using betawikis to test)
7. Go back to Special:Upload and upload a midi file (example can be got from https://commons.wikimedia.org/wiki/File:2_Star_Spangled_Banner.mid). If the midi file came from commons, give it a different filename and ignore the duplicate file warning.
8. Run the SQL query in step 4 to get the SHA-1 for the midi file.
9. Run the SQL query in step 5 with the SHA-1 from step 8 and verify that no rows are returned.

I have verified that the new code has been implemented and is functioning and displaying as expected... Thank you for the QA Steps @Dreamy_Jazz