Deprecate:
* `path` and `url` of `ActorImage` (used to represent account/channel
avatars/banners) in favour of `fileUrl`
* `path` of `AvatarInfo` (used in notifications) in favour of `fileUrl`
* `captionPath` of `VideoCaption` in favour of `fileUrl`
* `storyboardPath` of `Storyboard` in favour of `fileUrl`