fix: CORS AllowMethods에 PATCH 추가

유저 권한 변경(PATCH /api/users/:id/role) CORS 오류 수정

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

main.go

@@ -57,7 +57,7 @@ func main() {
 	app.Use(cors.New(cors.Config{
 		AllowOrigins: "https://a301.tolelom.xyz",
 		AllowHeaders: "Origin, Content-Type, Authorization",
-		AllowMethods: "GET, POST, PUT, DELETE",
+		AllowMethods: "GET, POST, PUT, PATCH, DELETE",
 	}))
 
 	routes.Register(app, authHandler, annHandler, dlHandler)