fix(cors): @Value 기본값에 wing.gc-si.dev 추가

application.yml의 CORS 설정과 동기화하여 프로덕션 환경에서
wing.gc-si.dev → guide.gc-si.dev 크로스오리진 요청 허용.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/main/java/com/gcsc/guide/config/SecurityConfig.java

@@ -29,7 +29,7 @@ public class SecurityConfig {
     private final JwtAuthenticationFilter jwtAuthenticationFilter;
     private final ObjectMapper objectMapper;
 
-    @Value("${app.cors.allowed-origins:http://localhost:5173,https://guide.gc-si.dev}")
+    @Value("${app.cors.allowed-origins:http://localhost:5173,http://localhost:5175,http://127.0.0.1:5175,https://guide.gc-si.dev,https://wing.gc-si.dev}")
     private List<String> allowedOrigins;
 
     @Bean