fix(metrics): REST API 경로 client_id 수집 누락 수정

- JWT 쿠키 파싱을 WebSocketStompConfig.extractClientIdFromRequest() static 메서드로 추출
- GisControllerV2 → GisServiceV2 → enqueueRestMetric에 clientId 전달 추가
- WebSocket 경로는 이미 정상 (htlee@gcsc.co.kr 수집 확인)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/main/java/gc/mda/signal_batch/domain/gis/controller/GisControllerV2.java

@@ -191,7 +191,11 @@ public class GisControllerV2 {
             )
             @RequestBody VesselTracksRequest request,
             HttpServletRequest httpRequest) {
-        return gisServiceV2.getVesselTracksV2(request, getClientIp(httpRequest));
+        return gisServiceV2.getVesselTracksV2(request, getClientIp(httpRequest), getClientId(httpRequest));
+    }
+
+    private String getClientId(HttpServletRequest request) {
+        return gc.mda.signal_batch.global.config.WebSocketStompConfig.extractClientIdFromRequest(request);
     }
 
     private String getClientIp(HttpServletRequest request) {

src/main/java/gc/mda/signal_batch/domain/gis/service/GisServiceV2.java

@@ -285,7 +285,7 @@ public class GisServiceV2 {
     /**
      * 선박별 항적 조회 V2 (캐시 + Semaphore + 간소화 + ChnPrmShip enrichment)
      */
-    public List<CompactVesselTrack> getVesselTracksV2(VesselTracksRequest request, String clientIp) {
+    public List<CompactVesselTrack> getVesselTracksV2(VesselTracksRequest request, String clientIp, String clientId) {
         String queryId = "rest-vessels-" + UUID.randomUUID().toString().substring(0, 8);
         long startMs = System.currentTimeMillis();
         boolean slotAcquired = false;
@@ -329,7 +329,7 @@ public class GisServiceV2 {
                     result.size(), request.getVessels().size(),
                     dailyTrackCacheManager.isEnabled(), request.isIncludeChnPrmShip());
 
-            enqueueRestMetric(queryId, request, result, startMs, clientIp);
+            enqueueRestMetric(queryId, request, result, startMs, clientIp, clientId);
 
             return result;
 
@@ -347,7 +347,7 @@ public class GisServiceV2 {
     }
 
     private void enqueueRestMetric(String queryId, VesselTracksRequest request,
-                                   List<CompactVesselTrack> result, long startMs, String clientIp) {
+                                   List<CompactVesselTrack> result, long startMs, String clientIp, String clientId) {
         try {
             int totalPoints = result.stream().mapToInt(CompactVesselTrack::getPointCount).sum();
             long responseBytes = (long) result.size() * 200 + (long) totalPoints * 40;
@@ -367,6 +367,7 @@ public class GisServiceV2 {
                     .elapsedMs(System.currentTimeMillis() - startMs)
                     .status("COMPLETED")
                     .clientIp(clientIp)
+                    .clientId(clientId)
                     .build());
         } catch (Exception e) {
             log.debug("Failed to enqueue REST metric: {}", e.getMessage());

src/main/java/gc/mda/signal_batch/global/config/WebSocketStompConfig.java

@@ -235,11 +235,16 @@ public class WebSocketStompConfig implements WebSocketMessageBrokerConfigurer {
             return "unknown";
         }
 
+        private String extractEmailFromJwtCookie(HttpServletRequest request) {
+            return extractClientIdFromRequest(request);
+        }
+    }
+
     /**
-         * GC_SESSION 쿠키에서 JWT payload의 email 클레임 추출.
+     * GC_SESSION 쿠키에서 JWT payload의 email 클레임 추출 (REST/WebSocket 공용).
      * JWT 검증은 nginx auth_request에서 이미 완료 — 여기서는 payload 디코딩만 수행.
      */
-        private String extractEmailFromJwtCookie(HttpServletRequest request) {
+    public static String extractClientIdFromRequest(HttpServletRequest request) {
         Cookie[] cookies = request.getCookies();
         if (cookies == null) return null;
 
@@ -253,12 +258,10 @@ public class WebSocketStompConfig implements WebSocketMessageBrokerConfigurer {
         if (token == null || token.isEmpty()) return null;
 
         try {
-                // JWT: header.payload.signature — payload만 Base64URL 디코딩
             String[] parts = token.split("\\.");
             if (parts.length < 2) return null;
 
             String payload = new String(Base64.getUrlDecoder().decode(parts[1]));
-                // 간단한 JSON 파싱 (Jackson 의존 없이): "email":"value" 추출
             int emailIdx = payload.indexOf("\"email\"");
             if (emailIdx < 0) return null;
 
@@ -272,5 +275,4 @@ public class WebSocketStompConfig implements WebSocketMessageBrokerConfigurer {
             return null;
         }
     }
-    }
 }