feat(payment-refund): 新增支付退款原付款用途编号字段

- 在 PaymentRefundItem 结构体中新增 PaymentPurposeNumber 字段
- 在 PaymentRefundAdd 结构体中新增 PaymentPurposeNumber 字段
- 在 ik3cloud 常量中新增 FilterCompareEqualNum 过滤比较常量

ik3cloud/constant/constant.go

@@ -116,6 +116,7 @@ type FilterCompare = string
 
 const (
 	FilterCompareEqual       FilterCompare = "67"  // 等于
+	FilterCompareEqualNum    FilterCompare = "29"  // 等于
 	FilterCompareStatusEqual FilterCompare = "105" // 状态等于
 	FilterCompareLte         FilterCompare = "16"  // 小于等于
 	FilterCompareGte         FilterCompare = "39"  // 大于等于