dev 반영 code-check 오류 수정

backend/internal/handler/auth_handler.go

@@ -80,7 +80,7 @@ const (
 	loginCodeExpiration    = 10 * time.Minute
 	linkResendCooldown     = 60 * time.Second
 	prefixDrySend          = "dry_send:"
-	headlessJWKSFetchTTL  = 5 * time.Second
+	headlessJWKSFetchTTL   = 5 * time.Second
 )
 
 type AuthHandler struct {