Add GRN batch and serial tracking

Distribution/Data/AppDBContext.cs

@@ -303,6 +303,13 @@ public class AppDBContext(DbContextOptions<AppDBContext> options) : DbContext(op
             .HasForeignKey(gr => gr.FK_PurchaseOrderId)
             .OnDelete(DeleteBehavior.Restrict);
 
+        modelBuilder.Entity<GoodsReceipt>()
+            .HasOne(gr => gr.Supplier)
+            .WithMany()
+            .HasForeignKey(gr => gr.FK_SupplierId)
+            .OnDelete(DeleteBehavior.Restrict)
+            .IsRequired(false);
+
         modelBuilder.Entity<GoodsReceipt>()
             .HasOne(gr => gr.Warehouse)
             .WithMany()
@@ -321,6 +328,13 @@ public class AppDBContext(DbContextOptions<AppDBContext> options) : DbContext(op
             .HasForeignKey(i => i.FK_PurchaseOrderItemId)
             .OnDelete(DeleteBehavior.Restrict);
 
+        modelBuilder.Entity<GoodsReceiptItem>()
+            .HasOne(i => i.Item)
+            .WithMany()
+            .HasForeignKey(i => i.FK_ItemId)
+            .OnDelete(DeleteBehavior.Restrict)
+            .IsRequired(false);
+
         modelBuilder.Entity<GoodsReceiptItem>()
             .HasIndex(i => i.FK_GoodsReceiptId);