Function hash_to_task 

async fn hash_to_task(
    path: String,
    watch_path: String,
    album_id: Option<String>,
    album_name: Option<String>,
    reassociate_only: bool,
    checksum: Option<String>,
    sidecar_enabled: bool,
) -> Result<FileTask, ()>

Hash a candidate file and submit it to the upload queue.