message: fix: prevent caching error pages
diff: @@ -420,7 +420,7 @@ def show_http_exception(ex: HTTPException) -> FlaskResponse:
  and ex.code in {404, 500}
  ):
  path = resource_filename("superset", f"static/assets/{ex.code}.html")
  - return send_file(path), ex.code
  + return send_file(path, cache_timeout=0), ex.code
  return json_errors_response(
  errors=[
  @@ -442,7 +442,7 @@ def show_command_errors(ex: CommandException) -> FlaskResponse:
  logger.warning(ex)
  if "text/html" in request.accept_mimetypes and not config["DEBUG"]:
  path = resource_filename("superset", "static/assets/500.html")
  - return send_file(path), 500
  + return send_file(path, cache_timeout=0), 500
  extra = ex.normalized_messages() if isinstance(ex, CommandInvalidError) else {}
  return json_errors_response(
  @@ -464,7 +464,7 @@ def show_unexpected_exception(ex: Exception) -> FlaskResponse:
  logger.exception(ex)
  if "text/html" in request.accept_mimetypes and not config["DEBUG"]:
  path = resource_filename("superset", "static/assets/500.html")
  - return send_file(path), 500
  + return send_file(path, cache_timeout=0), 500
  return json_errors_response(
  errors=[
  