[BE] refactor: 순환참조 이슈 해결 제발 (#98)

Signed-off-by: EunJiJung <bianbbc87@gmail.com>

Author: bianbbc87

src/backend/signaling-server/src/main/java/com/asyncgate/signaling_server/security/filter/FilterChannelInterceptor.java

@@ -26,6 +26,7 @@ public class FilterChannelInterceptor implements ChannelInterceptor {
     private static final String BEARER_PREFIX = "Bearer ";
     private final JsonWebTokenUtil jsonWebTokenUtil;
 
+    @Lazy  // ✅ Circular Dependency 방지
     private final KurentoManager kurentoManager;
 
     public FilterChannelInterceptor(JsonWebTokenUtil jsonWebTokenUtil, KurentoManager kurentoManager) {