feat(network)!: add v2 framing, pooled buffers and bounded dispatch

README.md

@@ -92,7 +92,7 @@ public static class PingHandlers
 
 ```csharp
 var service = new ShrinkNetworkService(
-    new ShrinkMessagePackNetworkSerializer(),
+    new ShrinkJsonNetworkSerializer(),
     new ShrinkNetworkMessageRegistry(),
     new ShrinkNetworkRouter());
 
@@ -285,9 +285,10 @@ new ShrinkRpcCallOptions
 
 ```csharp
 new ShrinkJsonNetworkSerializer()
-new ShrinkMessagePackNetworkSerializer()
 ```
 
+生成式 MessagePack 通过可选包 `Adapters~/MessagePack` 接入。使用 `ShrinkNetwork.MessagePack.ShrinkMessagePackNetworkSerializer(GeneratedResolver.Instance)` 并显式 `Register<T>()`；旧无参反射适配器已移除。消息体只编码一次，外层统一使用协议 v2 的 SHK2 二进制封装。
+
 ## ✅ 最佳实践
 
 - 所有消息统一用 `[ShrinkNetworkMessage]` 声明，不要只靠手写 `RegisterMessage<T>()`
@@ -367,3 +368,13 @@ var serverTransport = new ShrinkTcpServerTransport(
 ## 📄 License
 
 [MIT](LICENSE)
+
+## 可复用能力
+
+<!-- shrink:capabilities -->
+Capability: 消息合同、RPC、权限、TCP/KCP/Loopback 传输与有预算的串行排队
+Aliases: 联机 网络 远程 rpc 广播 拥塞 背压 同步
+Limits: 协议 v2 拒绝旧封装；TCP/KCP 均为可靠通道；可替换状态仅合并排队项，不用于快照分片
+Extension: RegisterMessage/RegisterHandler；IShrinkNetworkBufferSerializer；ShrinkNetworkWorkQueue 状态键
+Evidence: [ShrinkNetworkService](Runtime/Core/ShrinkNetworkService.cs); [ShrinkPacketCodec](Runtime/Serialization/ShrinkPacketCodec.cs); [ShrinkNetworkWorkQueue](Runtime/Core/ShrinkNetworkWorkQueue.cs)
+<!-- /shrink:capabilities -->