fix(issuer-service): 修复 LifecyclePipeline 接口字段与 Coupon.couponType 类型错误

- LifecyclePipeline 接口字段与实际返回值对齐 (minted/listed/sold/inCirculation/redeemed/recalled)
- coupon.type → coupon.couponType (Coupon entity 字段名修正)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/services/issuer-service/src/application/services/admin-coupon-analytics.service.ts

@@ -30,11 +30,13 @@ export interface CouponsByCategory {
 }
 
 export interface LifecyclePipeline {
-  draft: number;
+  minted: number;
-  active: number;
+  listed: number;
-  paused: number;
+  sold: number;
-  soldOut: number;
+  inCirculation: number;
+  redeemed: number;
   expired: number;
+  recalled: number;
   totalSold: number;
   totalRedeemed: number;
 }

backend/services/issuer-service/src/application/services/admin-merchant.service.ts

@@ -135,7 +135,7 @@ export class AdminMerchantService {
         issuerName: issuerMap.get(coupon.issuerId) || 'Unknown',
         couponName: coupon.name,
         couponId: coupon.id,
-        type: coupon.type,
+        type: coupon.couponType,
         timestamp: coupon.updatedAt.toISOString(),
       };
     });