Add SessionDiscoveryInfo to generated api-docs

Jellyfin.Server/Extensions/ApiServiceCollectionExtensions.cs

@@ -319,7 +319,7 @@ namespace Jellyfin.Server.Extensions
                 c.OperationFilter<FileResponseFilter>();
                 c.OperationFilter<FileRequestFilter>();
                 c.OperationFilter<ParameterObsoleteFilter>();
-                c.DocumentFilter<WebsocketModelFilter>();
+                c.DocumentFilter<AdditionalModelFilter>();
             });
         }
 

Jellyfin.Server/Filters/AdditionalModelFilter.cs

@@ -1,5 +1,6 @@
 using MediaBrowser.Common.Plugins;
 using MediaBrowser.Controller.LiveTv;
+using MediaBrowser.Model.ApiClient;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.Session;
 using MediaBrowser.Model.SyncPlay;
@@ -9,9 +10,9 @@ using Swashbuckle.AspNetCore.SwaggerGen;
 namespace Jellyfin.Server.Filters
 {
     /// <summary>
-    /// Add models used in websocket messaging.
+    /// Add models not directly used by the API, but used for discovery and websockets.
     /// </summary>
-    public class WebsocketModelFilter : IDocumentFilter
+    public class AdditionalModelFilter : IDocumentFilter
     {
         /// <inheritdoc />
         public void Apply(OpenApiDocument swaggerDoc, DocumentFilterContext context)
@@ -27,6 +28,7 @@ namespace Jellyfin.Server.Filters
             context.SchemaGenerator.GenerateSchema(typeof(GroupUpdate<object>), context.SchemaRepository);
 
             context.SchemaGenerator.GenerateSchema(typeof(SessionMessageType), context.SchemaRepository);
+            context.SchemaGenerator.GenerateSchema(typeof(ServerDiscoveryInfo), context.SchemaRepository);
         }
     }
 }