Method _is_timeout_error

src/services/flow_client.py:863–872

判断是否为网络超时，便于快速失败重试。

(self, error: Exception)

            raise Exception(f"Invalid JSON response: {body_text[:200]}") from exc

    def _is_timeout_error(self, error: Exception) -> bool:
        """判断是否为网络超时，便于快速失败重试。"""
        error_lower = str(error).lower()
        return any(keyword in error_lower for keyword in [
            "timed out",
            "timeout",
            "curl: (28)",
            "connection timed out",
            "operation timed out",
        ])

    def _is_proxy_connection_error(self, error: Exception) -> bool:
        """识别本地/上游代理不可用导致的连接失败。"""