2.54.2
(fix): Replace Activator.CreateInstance<TConverterType>() with new TConverterType()
in CollectionItemSerializer. The new() generic constraint allows compile-time
instantiation, removing the reflection-based call that is not AOT-safe.
2.54.1
(chore): Remove the generic EnumSerializer<T> template that used reflection
(GetField, GetCustomAttributes) at runtime. All enums already use
per-enum generated serializers with static dictionary lookups, so the
generic template was dead code. This cleanup removes the last
reflection-based enum serialization path, improving NativeAOT and
IL-trimming compatibility.