log : addNode 인자값 검사 로그 추가

Author: imscow11253

src/main/java/com/DSC/distributedCache/hashing/HashingManager.java

@@ -25,6 +25,7 @@ public class HashingManager {
     public void addNode(String node) {
         try {
             // Parse node address (e.g., "127.0.0.1:11211")
+            System.out.println("Adding node: " + node);
             String[] parts = node.split(":");
             String host = parts[0];
             int port = Integer.parseInt(parts[1]);