refactor: Standardize non-controller DTOs with lombok annotations

axhub-tool-core/src/main/java/io/shinhanlife/axhub/biz/mcp/tool/dto/ToolMetadata.java

@@ -1,7 +1,18 @@
 package io.shinhanlife.axhub.biz.mcp.tool.dto;
 
+import lombok.Getter;
+import lombok.Setter;
+import lombok.Builder;
+import lombok.NoArgsConstructor;
+import lombok.AllArgsConstructor;
+
 import java.util.Map;
 
+@Getter
+@Setter
+@Builder
+@NoArgsConstructor
+@AllArgsConstructor
 public class ToolMetadata {
     private String toolName;
     private String description;
@@ -12,9 +23,6 @@ public class ToolMetadata {
     private String podUrl;
     private String integrationType;
     private String mciServiceId;
-
-    public ToolMetadata() {}
-
     public String getToolName() { return toolName; }
     public void setToolName(String toolName) { this.toolName = toolName; }