feat: 增强支付模块和图片拼接功能，完善异常处理

- 新增 Stripe 支付依赖和支付测试控制器
- 完善抖音支付适配器，支持SHA256-RSA2048签名
- 优化图片拼接API的参数验证和错误处理
- 添加全局异常过滤器提升系统稳定性
- 更新配置文件和API文档
- 完善N8N模板结构

douyin_private_key.pem

@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----