Failed images cannot be reprocessed

[Skarlso]

Here: https://github.com/Skarlso/kube-cluster-sample/blob/master/image_processor/db.go#L47

err = dc.QueryRow("select path from images where id = ? and status = ?", id, PENDING).Scan(&path)

Since it's only looking for PENDING images, FAILEDPROCESSING will never be re-processed.

[Skarlso]

I need another, periodic process, which checks for failed images and re-processes them.

[Skarlso]

The process needs to handle potentially millions of image compares.