Fix GRN pricing

Distribution/Models/GoodsReceipt.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel.DataAnnotations.Schema;
+using Microsoft.EntityFrameworkCore;
 
 namespace Distribution.Models
 {
@@ -27,6 +28,14 @@ namespace Distribution.Models
 
         public DateTime ReceivedAt { get; set; } = DateTime.Now;
 
+        /// <summary>GRN-wide default discount %, applied to any line that doesn't set its own.</summary>
+        [Precision(5, 2)]
+        public decimal DiscountPercent { get; set; }
+
+        /// <summary>GRN-wide default VAT %, applied to any line that doesn't set its own.</summary>
+        [Precision(5, 2)]
+        public decimal VatPercent { get; set; }
+
         public ICollection<GoodsReceiptItem> Items { get; set; } = [];
     }
 }