fix: [stat] 출하 집계 shipping_cost 컬럼 참조 오류 수정

- shipments.shipping_cost 컬럼이 3/18 배차 분리 시 삭제되었으나 집계 코드 미수정
- shipment_vehicle_dispatches.options->total_amount JOIN으로 변경

app/Services/Stats/SalesStatService.php

@@ -61,16 +61,19 @@ public function aggregateDaily(int $tenantId, Carbon $date): int
             ->distinct('client_id')
             ->count('client_id');
 
-        // 출하 집계 (shipments)
+        // 출하 집계 (shipments + vehicle_dispatches 운송비)
         $shipmentStats = DB::connection('mysql')
-            ->table('shipments')
-            ->where('tenant_id', $tenantId)
-            ->where('scheduled_date', $dateStr)
-            ->where('status', 'completed')
-            ->whereNull('deleted_at')
+            ->table('shipments as s')
+            ->leftJoin('shipment_vehicle_dispatches as d', function ($join) {
+                $join->on('d.shipment_id', '=', 's.id')->whereNull('d.deleted_at');
+            })
+            ->where('s.tenant_id', $tenantId)
+            ->where('s.scheduled_date', $dateStr)
+            ->where('s.status', 'completed')
+            ->whereNull('s.deleted_at')
             ->selectRaw('
-                COUNT(*) as shipment_count,
-                COALESCE(SUM(shipping_cost), 0) as shipment_amount
+                COUNT(DISTINCT s.id) as shipment_count,
+                COALESCE(SUM(CAST(JSON_UNQUOTE(JSON_EXTRACT(d.options, "$.total_amount")) AS DECIMAL(12,0))), 0) as shipment_amount
             ')
             ->first();