fix(sdk-cpp): 补交 tcp_transport.h——<queue> include 与 inbound 公开接口

上两提交（b9397da4b 主实现 / fe9bf0d 修复）都没带上这个头文件：
- <queue> 缺失 → inbound_queue_ 声明失败连锁（SDK 镜像与 CI - C++
  连续红灯：'queue' does not name a template type）
- inbound 方法块误落 private 段 → SetInboundHandler 不可达

工作区早有修复但未 git add——本次补交。

Author: cuihairu

sdks/cpp/include/croupier/sdk/tcp_transport.h

@@ -14,6 +14,7 @@
 #include <functional>
 #include <memory>
 #include <mutex>
+#include <queue>
 #include <string>
 #include <thread>
 #include <unordered_map>
@@ -107,6 +108,17 @@ class TCPTransport {
      */
     bool IsConnected() const;
 
+    // ---- Inbound (Agent -> Provider calls) ----
+    // Read loop only dispatches; handlers run on a bounded worker pool
+    // (default = hardware concurrency, queue = workers * 4, overflow
+    // fast-fails with an empty response so Agent failover takes over).
+    using InboundHandler = std::function<std::vector<uint8_t>(uint32_t msg_id, uint32_t req_id, const std::vector<uint8_t>& body)>;
+
+    void SetInboundHandler(InboundHandler handler);
+    void DispatchInbound(uint32_t msg_id, uint32_t req_id, std::vector<uint8_t> body);
+    void WriteResponseSilently(uint32_t resp_msg_id, uint32_t req_id, const std::vector<uint8_t>& body);
+    static int InboundWorkerCount();
+
     /**
      * Send a request and wait for response.
      *
@@ -141,17 +153,6 @@ class TCPTransport {
         }
     };
 
-    // ---- Inbound (Agent -> Provider calls) ----
-    // Read loop only dispatches; handlers run on a bounded worker pool
-    // (default = hardware concurrency, queue = workers * 4, overflow
-    // fast-fails with an empty response so Agent failover takes over).
-    using InboundHandler = std::function<std::vector<uint8_t>(uint32_t msg_id, uint32_t req_id, const std::vector<uint8_t>& body)>;
-
-    void SetInboundHandler(InboundHandler handler);
-    void DispatchInbound(uint32_t msg_id, uint32_t req_id, std::vector<uint8_t> body);
-    void WriteResponseSilently(uint32_t resp_msg_id, uint32_t req_id, const std::vector<uint8_t>& body);
-    static int InboundWorkerCount();
-
     void ReadLoop();
     int ReadFully(void* buf, size_t count);
     static void PutMsgId(uint8_t* buf, uint32_t msg_id);