feat(pricing): 添加券码管理和使用功能

- 新增券码批次配置和券码实体
- 实现券码创建、领取、使用等接口
- 添加券码状态和优惠类型枚举
- 优化价格计算逻辑，支持券码优惠
- 新增优惠检测和应用相关功能

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

@@ -0,0 +1,25 @@
+package com.ycwl.basic.pricing.dto.resp;
+
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+@Data
+public class VoucherBatchResp {
+    private Long id;
+    private String batchName;
+    private Long scenicId;
+    private Long brokerId;
+    private Integer discountType;
+    private String discountTypeName;
+    private BigDecimal discountValue;
+    private Integer totalCount;
+    private Integer usedCount;
+    private Integer claimedCount;
+    private Integer availableCount;
+    private Integer status;
+    private String statusName;
+    private Date createTime;
+    private Long createBy;
+}

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

@@ -0,0 +1,15 @@
+package com.ycwl.basic.pricing.dto.resp;
+
+import lombok.Data;
+
+@Data
+public class VoucherBatchStatsResp {
+    private Long batchId;
+    private String batchName;
+    private Integer totalCount;
+    private Integer claimedCount;
+    private Integer usedCount;
+    private Integer availableCount;
+    private Double claimedRate;
+    private Double usedRate;
+}

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

@@ -0,0 +1,27 @@
+package com.ycwl.basic.pricing.dto.resp;
+
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+@Data
+public class VoucherCodeResp {
+    private Long id;
+    private Long batchId;
+    private String batchName;
+    private Long scenicId;
+    private String code;
+    private Integer status;
+    private String statusName;
+    private Long faceId;
+    private Date claimedTime;
+    private Date usedTime;
+    private String remark;
+    private Date createTime;
+    
+    private Integer discountType;
+    private String discountTypeName;
+    private String discountDescription;
+    private BigDecimal discountValue;
+}