Service(s) need to be created that allow an image listed in the `mediamoderation_scan` table or present in the `uploadstash` table to be scanned using the PhotoDNA API. These services should meet the following requirements:
* Failures or rate-limit exceeds should be properly handled, such that the file is still marked as unscanned
* If the thumbnail for an image is not available and cannot be generated on-demand, the image should be skipped and still marked as unscanned
* When a scan occurs, a `statsd` event should be created with relevant description about which code triggered the scan.
* The service(s) should return the scan result to the caller or should update the `mediamoderation_scan` row.
A service currently exists in the extension to do this in the extension, but will be re-written to support the needs of {T351399} and {T351396}.
=====Acceptance criteria
[] These services should meet the requirements detailed above
[] These services should be fully tested