feat(pricing): 实现优惠券打印功能

- 新增 AppVoucherController 控制器处理打印请求
- 实现 VoucherPrintService 接口和 VoucherPrintServiceImpl 实现类
- 添加 VoucherPrintReq 请求对象和 VoucherPrintResp 响应对象
- 创建 VoucherPrintRecord 实体和对应的 Mapper
- 更新 PriceVoucherCodeMapper 接口，添加随机获取未打印券码的方法
- 实现分布式锁机制防止重复打印- 生成流水号并记录打印状态

src/main/java/com/ycwl/basic/pricing/dto/req/VoucherClaimReq.java

@@ -7,4 +7,5 @@ public class VoucherClaimReq {
     private Long scenicId;
     private Long brokerId;
     private Long faceId;
+    private String code;
 }

src/main/java/com/ycwl/basic/pricing/dto/req/VoucherPrintReq.java

@@ -0,0 +1,16 @@
+package com.ycwl.basic.pricing.dto.req;
+
+import lombok.Data;
+
+/**
+ * 打印小票请求
+ */
+@Data
+public class VoucherPrintReq {
+    
+    private Long faceId;
+    
+    private Long brokerId;
+    
+    private Long scenicId;
+}

src/main/java/com/ycwl/basic/pricing/dto/resp/VoucherPrintResp.java

@@ -0,0 +1,37 @@
+package com.ycwl.basic.pricing.dto.resp;
+
+import lombok.Data;
+
+import java.util.Date;
+
+/**
+ * 打印小票响应
+ */
+@Data
+public class VoucherPrintResp {
+    
+    /**
+     * 流水号
+     */
+    private String code;
+    
+    /**
+     * 券码
+     */
+    private String voucherCode;
+    
+    /**
+     * 打印状态：0=待打印，1=打印成功，2=打印失败
+     */
+    private Integer printStatus;
+    
+    /**
+     * 错误信息
+     */
+    private String errorMessage;
+    
+    /**
+     * 创建时间
+     */
+    private Date createTime;
+}