Refactored order item retrieval error message

LiteCharms.Features.MidrandBooks/Orders/OrderService.cs

@@ -203,6 +203,26 @@ public sealed class OrderService(IDbContextFactory<MidrandBooksDbContext> contex
         }
     }
 
+    public async ValueTask<Result<OrderItem[]>> GetOrderItemsAsync(long orderId, CancellationToken cancellationToken = default)
+    {
+        try
+        {
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var orderItems = await context.OrderItems
+                .Where(o => o.OrderId == orderId)
+                .ToListAsync(cancellationToken);
+
+            return orderItems.Count > 0
+                ? Result.Ok(orderItems.Select(i => i.ToModel()).ToArray())
+                : Result.Fail<OrderItem[]>($"Order items not found for order ID {orderId}");
+        }
+        catch (Exception ex)
+        {
+            return Result.Fail(new Error(ex.Message).CausedBy(ex));
+        }
+    }
+
     public async ValueTask<Result<Order[]>> GetOrdersByCustomerAsync(long customerId, CancellationToken cancellationToken = default)
     {
         try