add preferred language (#109)

* add explicit warning for zero/invalid duration media items

* set dateadded on plex media versions

* add media stream table

* save local media streams to db

* save plex media streams to db

* add preferred language settings (no validation)

* use preferred language if possible

* code cleanup

* proper language code validation

* force scan of all libraries to pull in media streams

ErsatzTV.Infrastructure/Data/Repositories/PlayoutRepository.cs

@@ -57,8 +57,14 @@ namespace ErsatzTV.Infrastructure.Data.Repositories
                 .ThenInclude(mi => (mi as Episode).MediaVersions)
                 .ThenInclude(mv => mv.MediaFiles)
                 .Include(i => i.MediaItem)
+                .ThenInclude(mi => (mi as Episode).MediaVersions)
+                .ThenInclude(mv => mv.Streams)
+                .Include(i => i.MediaItem)
                 .ThenInclude(mi => (mi as Movie).MediaVersions)
                 .ThenInclude(mv => mv.MediaFiles)
+                .Include(i => i.MediaItem)
+                .ThenInclude(mi => (mi as Movie).MediaVersions)
+                .ThenInclude(mv => mv.Streams)
                 .AsNoTracking()
                 .SingleOrDefaultAsync()
                 .Map(Optional);