Uploads occasionally need to be retried

[slifty]

The permanent backend occasionally responds with an error on upload. The error is something like this:

  input: {
    message: 'SQLSTATE[25P02]: In failed sql transaction: 7 ERROR:  current transaction is aborted, commands ignored until end of transaction block'
  }

A few things to note:

1. This issue is on the backend, and should translate to a backend issue.
2. The sdk does not properly parse these responses.

I think the sftp service is actually handling this outcome appropriately: responding with a FAILURE status to the sftp client (rclone handles this well enough with a retry, which tends to fix the issue). That said I wanted to at least make the issue here as a first step in the triage (and we can close it once the sdk and backend issues are created)