feat: add trace-id and request-id header logging to tool controller

dap-gateway/src/main/java/io/shinhanlife/dap/mcg/service/ExecuteService.java

@@ -232,6 +232,10 @@ public class ExecuteService {
                     }
                     String executeApiUrl = targetUrl + "/mcp/" + metadata.getName();
                     
+                    Map<String, String> headers = new java.util.HashMap<>();
+                    headers.put("trace-id", java.util.UUID.randomUUID().toString());
+                    headers.put("request-id", context.requestId());
+                    
                     ObjectNode pageArguments = paginationValidator.normalize(arguments);
                     LargeToolResponseService.Collector collector = largeResponses.newCollector(metadata.getName(), context.requestId());
 
@@ -244,7 +248,7 @@ public class ExecuteService {
                         
                         JsonNode data = null;
                         try {
-                            data = toolInvoker.invoke(pagePayload, executeApiUrl);
+                            data = toolInvoker.invoke(pagePayload, executeApiUrl, headers);
                         } catch (org.springframework.web.client.RestClientResponseException e) {
                             // HTTP 4xx, 5xx 에러는 연결 오류가 아니라 비즈니스 로직 오류이거나 검증 실패이므로 원본 에러를 그대로 반환
                             throw new ToolExecutionException(FailureType.SERVER_ERROR, "Tool Pod HTTP 에러 (" + e.getStatusCode() + "): " + e.getResponseBodyAsString());
@@ -253,7 +257,7 @@ public class ExecuteService {
                                 String fallbackUrl = executeApiUrl.replaceAll("http://tool-[a-zA-Z0-9-]+", "http://localhost");
                                 log.warn(" [ExecuteService] 호스트를 찾을 수 없어 localhost로 재시도합니다: {}", fallbackUrl);
                                 try {
-                                    data = toolInvoker.invoke(pagePayload, fallbackUrl);
+                                    data = toolInvoker.invoke(pagePayload, fallbackUrl, headers);
                                 } catch (Exception ex) {
                                     throw new ToolExecutionException(FailureType.SERVER_ERROR, "Tool Pod 호출 실패 (localhost 재시도 포함): " + ex.getMessage());
                                 }

dap-gateway/src/main/java/io/shinhanlife/dap/mcg/transport/HttpToolInvoker.java

@@ -40,14 +40,17 @@ public class HttpToolInvoker implements ToolInvoker {
     }
 
     @Override
-    public JsonNode invoke(Map<String, Object> payload, String targetUrl) {
+    public JsonNode invoke(Map<String, Object> payload, String targetUrl, Map<String, String> headers) {
         try {
-            Object httpResult = restClient.post()
+            RestClient.RequestBodySpec requestSpec = restClient.post()
                     .uri(targetUrl)
-                    .contentType(MediaType.APPLICATION_JSON)
+                    .contentType(MediaType.APPLICATION_JSON);
-                    // TODO: Use actual tenant's key
+                    
-                    .header("X-Trace-Id", UUID.randomUUID().toString())
+            if (headers != null) {
-                    .body(payload)
+                headers.forEach(requestSpec::header);
+            }
+            
+            Object httpResult = requestSpec.body(payload)
                     .retrieve()
                     .body(Object.class);
             

dap-gateway/src/main/java/io/shinhanlife/dap/mcg/transport/ToolInvoker.java

@@ -22,5 +22,5 @@ import java.util.Map;
  * Tool 서버 호출 transport의 최소 공통 인터페이스입니다.
  */
 public interface ToolInvoker {
-    JsonNode invoke(Map<String, Object> payload, String targetUrl);
+    JsonNode invoke(Map<String, Object> payload, String targetUrl, Map<String, String> headers);
 }

dap-tool-core/src/main/java/io/shinhanlife/dap/mcc/presentation/BusinessToolController.java

@@ -70,10 +70,13 @@ public class BusinessToolController {
     public ResponseEntity<?> executeDynamicTool(
             @PathVariable("name") String functionName,
             @RequestHeader(value = "X-Request-Id", required = false) String headerRequestId,
+            @RequestHeader(value = "trace-id", required = false) String traceId,
+            @RequestHeader(value = "request-id", required = false) String requestId,
             @RequestBody(required = false) Map<String, Object> arguments) {
         
         String finalRequestId = headerRequestId;
         
+        log.info(" [Tool] IN - trace-id: {}, request-id: {}", traceId, requestId);
         log.info("\n [Tool] 동적 툴 실행 요청 수신 (함수명): {}", functionName);
         if (arguments != null) {
             try {
@@ -198,7 +201,13 @@ public class BusinessToolController {
                 log.info("[Tool -> MCP Gateway] 동적 툴 실행 결과 반환: {}", methodResult);
             }
             
-            return ResponseEntity.ok(methodResult);
+            log.info(" [Tool] OUT - trace-id: {}, request-id: {}", traceId, requestId);
+            
+            ResponseEntity.BodyBuilder responseBuilder = ResponseEntity.ok();
+            if (traceId != null) responseBuilder.header("trace-id", traceId);
+            if (requestId != null) responseBuilder.header("request-id", requestId);
+            
+            return responseBuilder.body(methodResult);
 
         } catch (Exception e) {
             log.error("[Tool] 리플렉션 실행 중 예외 발생: {}", e.getMessage());