fix: count distinct SKU codes across shared pallet inbounds

firstleg/src/main/java/com/baiyue/firstleg/service/DropshipPalletizationService.java

@@ -231,7 +231,8 @@ public class DropshipPalletizationService {
    values.stream().map(v->v.carton().getBoxCode()).toList());}).toList();
   int discrepancies=(int)cartons.stream().filter(c->"ACCEPTED_VARIANCE".equals(c.getDiscrepancyStatus())).count();
   PalletMetrics metrics=mapper.metrics(row.getId());
-  return new Pallet(row.getId(),row.getPalletNo(),row.getPalletStatus(),cartons.size(),items.size(),discrepancies,
+  int skuCount=(int)items.stream().map(SkuItem::skuCode).distinct().count();
+  return new Pallet(row.getId(),row.getPalletNo(),row.getPalletStatus(),cartons.size(),skuCount,discrepancies,
    metrics==null?BigDecimal.ZERO:metrics.weightKg(),metrics==null?BigDecimal.ZERO:metrics.volumeCbm(),row.getVersion(),items,
    cartons.stream().map(c->cartonView(c,c.getInboundCode(),false,null)).toList(),row.getCompletedAt());
  }

firstleg/src/main/resources/openapi/dropship-palletization-v1.yaml

@@ -163,7 +163,7 @@ components:
         palletNo: {$ref: '#/components/schemas/PalletNo'}
         status: {type: string, enum: [OPEN, SEALED]}
         cartonCount: {type: integer, minimum: 0}
-        skuCount: {type: integer, minimum: 0}
+        skuCount: {type: integer, minimum: 0, description: '整托按 SKU 编码去重的种类数，包含合托全部入仓码，不是商品件数或入仓明细数'}
         discrepancyCartons: {type: integer, minimum: 0}
         weightKg: {type: number, minimum: 0}
         volumeCbm: {type: number, minimum: 0}