Restore previous serializer behaviour

Use the approved workaround for the changes to JSON source generation and runtime serialization.

src/API/ApiBuilder.cs

@@ -3,6 +3,7 @@
 
 using System.IO.Compression;
 using System.Net.Mime;
+using System.Text.Json.Serialization.Metadata;
 using MartinCostello.Api.Extensions;
 using MartinCostello.Api.Options;
 using Microsoft.AspNetCore.CookiePolicy;
@@ -79,7 +80,9 @@ public static WebApplication Configure(WebApplicationBuilder builder)
  {
  options.SerializerOptions.PropertyNameCaseInsensitive = false;
  options.SerializerOptions.WriteIndented = true;
- options.SerializerOptions.AddContext<ApplicationJsonSerializerContext>();
+ options.SerializerOptions.TypeInfoResolver = JsonTypeInfoResolver.Combine(
+ ApplicationJsonSerializerContext.Default,
+ new DefaultJsonTypeInfoResolver());
  });
 
  builder.Services.AddResponseCompression((options) =>

src/API/Swagger/ExampleFilter.cs

@@ -28,8 +28,7 @@ internal sealed class ExampleFilter : IOperationFilter, IParameterFilter, ISchem
  /// <param name="options">The <see cref="JsonOptions"/> to use.</param>
  public ExampleFilter(IOptions<JsonOptions> options)
  {
- _options = new(options.Value.SerializerOptions);
- _options.TypeInfoResolver = null; // Remove the JsonSerializerContext
+ _options = options.Value.SerializerOptions;
  }
 
  /// <inheritdoc />