Asphalt should exit if and when the user uploading assets gets moderated

[jisham318]

Currently gets stuck in a loop when roblox decides to falsely flag an image as violating ToS... ridiculous on Roblox's part.

[WARN  asphalt::sync::perform] Failed to sync asset [REDACTED]: Failed to upload asset

    Caused by:
        0: Failed to get image ID
        1: Failed to parse asset XML response:
           {"errors":[{"code":0,"message":"User is moderated"}]}       
        2: Syntax: 1:1 Unexpected characters outside the root element: {
        3: 1:1 Unexpected characters outside the root element: {