release(v0.4.4): use TradeClient::with_secret_key in trade example

Author: hotea

CHANGELOG.md

@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.4.4] - 2026-07-03
+
+### Fixed
+
+- **examples 未使用 `secret_key`**：`trade_example` 始终用 `TradeClient::new`，即使 config 中已加载 `secret_key`，机构账号下所有交易接口报 `access forbidden`；现在当 config 含 `secret_key` 时自动改用 `TradeClient::with_secret_key`
+
 ## [0.4.3] - 2026-06-24
 
 ### Added

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "tigeropen"
-version = "0.4.3"
+version = "0.4.4"
 edition = "2021"
 rust-version = "1.70"
 description = "老虎证券 OpenAPI Rust SDK"