fix(sdk-java): 响应路由回归——pending reqId 优先匹配，请求帧才走 inbound

上提交把路由改成先判 isResponse 再查 pending，破坏了既有语义：
mock/旧对端可能用非标准响应 msgId（如 0x030106）回帧——先判类型
导致这类帧既不 signal pending 也不 dispatch，请求挂起超时
（TCPTransportEdgeTest 两例失败：idle read / malformed skip）。

恢复原顺序：按 pending reqId 匹配优先（不看 msgId 类型），未命中
且 isRequest 才 inbound 分发。全量 gradle test 通过。

Author: cuihairu

sdks/java/src/main/java/io/github/cuihairu/croupier/sdk/transport/TCPTransport.java

@@ -272,16 +272,16 @@ private void readLoop() {
                 byte[] body = new byte[payload.length - PROTOCOL_HEADER_SIZE];
                 System.arraycopy(payload, PROTOCOL_HEADER_SIZE, body, 0, body.length);
 
-                if (Protocol.isResponse(msgId)) {
-                    // Route to pending request
-                    ResponseLatch latch = pendingResponses.get(reqId);
-                    if (latch != null) {
-                        latch.signal(body, msgId);
-                    } else {
-                        LOG.debug("No pending request for reqId: {}", reqId);
-                    }
+                // 响应优先按 pending reqId 匹配（保持既有语义：mock/旧对端
+                // 可能用非标准响应 msgId 回帧）；未命中 pending 且是请求帧
+                // 才走 inbound 分发（Agent -> Provider 调用）。
+                ResponseLatch latch = pendingResponses.get(reqId);
+                if (latch != null) {
+                    latch.signal(body, msgId);
                 } else if (Protocol.isRequest(msgId)) {
                     dispatchInbound(msgId, reqId, body);
+                } else {
+                    LOG.debug("No pending request for reqId: {}", reqId);
                 }
             }
         } catch (IOException e) {