apply gemini-code-assist's suggestion.

Author: caozhanhao

mooncake-transfer-engine/include/transport/rdma_transport/rdma_endpoint.h

@@ -126,6 +126,9 @@ class RdmaEndPoint {
                           std::string *reply_msg = nullptr);
 
    private:
+    static constexpr uint64_t kWaitExistingHandshakeTimeoutNano =
+        10 * 1000000000ull;  // 10 seconds
+
     RdmaContext &context_;
     std::atomic<Status> status_;
 

mooncake-transfer-engine/src/transport/rdma_transport/rdma_endpoint.cpp

@@ -169,7 +169,8 @@ int RdmaEndPoint::setupConnectionsByActive() {
         while (status_.load(std::memory_order_acquire) == CONNECTING) {
             PAUSE();
             // Prevent infinite wait with a 10-second timeout
-            if (getCurrentTimeInNano() - start_time > 10 * 1000000000ull) {
+            if (getCurrentTimeInNano() - start_time >
+                kWaitExistingHandshakeTimeoutNano) {
                 return ERR_ENDPOINT;
             }
         }