Migration 22 to 23 issue

When we switched to model 23, we also changed the way we identify a playlist, by going from counting the number of subitems to identifying relevant extensions, and tagging such files as file_type = IFile::Type::Playlist in the Task table.

However, old tasks weren't flagged with the playlist file_type.

This causes an issue when we try to process an incomplete task, as it will now be handled as a media.

When the existing entities are being restored, we fetch the file first, and get its associated media, which is nowhere to be found, causing the assertion

else if ( item.media() == nullptr )
{
    // If we have a file but no media, this is a problem, we can analyze as
    // much as we want, but won't be able to store anything.
    // Keep in mind that if we are in this code path, we are not analyzing
    // a playlist.
    assert( false );
    return Status::Fatal;
}

to trigger in debug, or the task to be ignored due to a failure in release.

In all cases, the Task was created with a file_type of Main There are two cases to handle:

• The file has been created, and we can update all tasks which are pointing to a playlist instead of a media
• The file was not created, in which case the easiest way out is probably to remove the task and wait for the reload to detect it again