feat(apple): 新增服务器通知续订与JWT解析能力

- 支持解析Apple签名JWT并提取交易信息
- 新增processRenewNotification处理续订通知
- 添加测试用JWT生成、解析及发送重试记录示例
- 移除废弃ApplePayUtil，统一走新验证逻辑

src/test/java/com/yolo/keyborad/test.java

@@ -0,0 +1,32 @@
+package com.yolo.keyborad;
+
+import com.apple.itunes.storekit.signature.JWSSignatureCreator;
+
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.UUID;
+
+/*
+ * @author: ziin
+ * @date: 2025/12/12 18:56
+ */
+public class test {
+    public static void main(String[] args) throws Exception {
+        try {
+            String jwt = AppStoreJWT.generateJWT();
+
+            URL url = new URL("https://api.storekit.itunes.apple.com/inApps/v1/subscriptions"); // 你需要访问的 Apple API URL
+            HttpURLConnection connection = (HttpURLConnection) url.openConnection();
+            connection.setRequestMethod("GET");
+            connection.setRequestProperty("Authorization", "Bearer " + jwt); // 设置 JWT 为 Bearer Token
+
+            // 处理响应
+            int responseCode = connection.getResponseCode();
+            System.out.println("Response Code: " + responseCode);
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+}