refactor: 支付链路规范化 — 统一命名/层次/传参

- ISDKHelper.pay() 增加 productPrice 参数，与 UnityKnowNew 签名对齐
- FlexionSDKHelper: prodPrice/prodCount 从参数直接写入 developerPayload
- playerId → userId 统一命名 (SDKTest/Java payload)
- pfId → pfid 统一小写 (服务端 JSON key)
- PaymentInfo 序列化替代 StringBuilder 手拼 JSON
- FlexionPaymentVerifier.Consume 走 UnityBridgeFunc.ConsumePurchase 桥接层
- UnityBridgeFunc 新增 ConsumePurchase 通用方法，移除渠道特定方法
- SDKManager.ConsumeFlexionPurchase → ConsumePurchase 通用化

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

sdk-intergration/Packages/tysdk/Plugins/Android/SDKManager.java

@@ -60,8 +60,9 @@ public class SDKManager {
     // Channel helper
     public interface ISDKHelper {
         void init(Activity activity);
-        void pay(Activity activity, String productId, String productName,
-                 String productCount, String prodorderId, String appInfo);
+        void pay(Activity activity, String productId, String productPrice,
+                 String productName, String productCount, String prodorderId,
+                 String appInfo);
         void queryProducts();
         void consume(String token);
     }
@@ -72,8 +73,8 @@ public class SDKManager {
         sdkHelper = helper;
     }
 
-    public static void ConsumeFlexionPurchase(String token) {
-        Log.i(TAG, "ConsumeFlexionPurchase: token=" + token);
+    public static void ConsumePurchase(String token) {
+        Log.i(TAG, "ConsumePurchase: token=" + token);
         if (sdkHelper != null) {
             sdkHelper.consume(token);
         }
@@ -395,7 +396,7 @@ public class SDKManager {
                                      String productCount, String prodorderId, String appInfo,
                                      String ptype) {
         if (sdkHelper != null) {
-            sdkHelper.pay(UnityPlayer.currentActivity, productId, productName, productCount, prodorderId, appInfo);
+            sdkHelper.pay(UnityPlayer.currentActivity, productId, productPrice, productName, productCount, prodorderId, appInfo);
             return;
         }
         PayEventData.PayData payData = new PayEventData.PayData();