Backdrop image used for primary image in 10.8 Alpha 1 / TVmaze plugin 9

[bzzbrr]

Describe the bug
When scanning using the TVmaze plugin v9 on Jellyfin 10.8.0 Alpha 1 it appears that only backdrop images are pulled. The primary images for each series / season are instead the backdrop images, which are wider than they are tall, cropped to fit the taller-than-wide primary image space. Episode images are also not pulled (or not saved), while cast images appear to work correctly.

System (please complete the following information):
OS: Ubuntu 20.04
Virtualization: Docker debian image
Browser: Firefox 93
Jellyfin Version: 10.8.0-alpha1
Installed Plugins: TVmaze v9

To Reproduce
Scan a TV library with only the TVmaze plugin enabled using the 10.8 alpha.

Expected behavior
What TVmaze calls poster images should be used for the primary images for jellyfin. Episode images should exist.

Server Logs
Logs are identical between 10.7.7 and 10.8.0, at least for the series image fetcher, one show for example:

[2021-11-12 00:13:17.367 +00:00] [INF] [26]
 Jellyfin.Plugin.TvMaze.Providers.TvMazeSeriesImageProvider: [GetImages] Images found for "Altered Carbon": [
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/240/602152.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/137/344138.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/143/358571.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/143/358572.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/143/358573.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/143/358574.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/178/445113.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/178/445114.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/178/445115.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/178/445117.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/178/445119.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/178/445120.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/244/610433.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/244/610434.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/244/610435.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Primary, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/145/364913.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Backdrop, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/218/547437.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Backdrop, RatingType: Score }, 
 { ProviderName: "TVmaze", Url: "https://static.tvmaze.com/uploads/images/original_untouched/243/609045.jpg", ThumbnailUrl: null, Height: null, Width: null, CommunityRating: null, VoteCount: null, Language: "en", Type: Backdrop, RatingType: Score }]