v0.37.0 Argument transformers. Generic serializer coverage. Desync value formatters

Fixed

• Argument transformers ([Transformer] / [Transform] / [SkipTransform]) work. They were non-functional in every mode: the client never boxed (the only boxing implementation sat in a generator unregistered from the pipeline), MetaContext.TransformerRegistry was never assigned by anything, so auto-discovered transformers silently never ran, and any parameter attribute whose name contained "Transform" — [SkipTransform] included — flipped the MemoryPack dispatcher to a reader the client did not write for, failing the RPC outright.
• Query methods with arguments were misframed under MemoryPack: the query client wrote a length-prefixed envelope while the dispatcher deserialized positionally. Pre-existing and unrelated to transformers; no Query method in the repo took arguments, which is why it never fired.

Changed

• Breaking, behaviour: the client substitutes Unbox(Box(arg)) before running a method locally, so both sides execute against the same value. A method body now sees the unboxed object, not the instance the caller passed.
• Breaking, wire: a transformed argument travels as its boxed type in exactly one wire member instead of a length-prefixed byte[]. Framing is now identical to any other argument, so transformers stay on the MemoryPack fast path. Nothing working can regress — no configuration of this feature transmitted correctly before.
• Which parameter is transformed is settled at compile time from the compilation — client, server dispatcher, broadcast replay, query proxies, {Service}ServerApi and cross-entity hops all derive the same answer, so the two ends of a wire cannot disagree. TransformerRegistrations.RegisterAll is no longer needed and does nothing; remove the call.
• [Transformer(UseResolver = true)] is excluded from discovery — it could never work on the client, where ClientMetaContext.ResolveService throws by design.

Added

• MetaTransformer<T>.Instance — per-type singleton the generated box/unbox call sites bind to. No reflection, no registry lookup on the RPC path.
• End-to-end coverage for the generic codegen branch ([assembly: MetaSerializer(SerializerType.Generic)]): SharedMeta.Test.Meta2.Generic plus SharedMeta.GenericSerializerTests, on its own cluster since method ids are per-assembly and a session carries one server signature. Only the MemoryPack branch was exercised before, and every wire bug in this release was serializer-specific.
• Desync messages print result values instead of type names — DesyncException.Message and the [Desync] log line used to show the same type name for both sides, because object.ToString() is all a plain DTO has. The generator emits a MetaDescribe formatter per result type (DesyncFormatters.g.cs); resolved at compile time, so IL2CPP stripping cannot break it. Types overriding ToString() (records included) keep their own rendering.
• [assembly: SharedMetaDiagnosticsOptions(DesyncValues = DesyncValueDetail.Short)] — trims the dump project-wide: nested types render as <TypeName>, collections as [N items]. Default Full recurses 3 levels and lists 8 elements.