Properties are not visible in open api spec when using BindAsync

[illunix]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

GetItemsQuery properties are not visible in OpenApi spec when I have BindAsync method

Expected Behavior

Properties should be in open api spec

Steps To Reproduce

public sealed record GetItemsQuery(
    string? SearchTerms,
    Category? Category,
    IEnumerable<ItemState> ItemStates
) : PagedQuery<ItemDto>
{
    public static ValueTask<GetItemsQuery?> BindAsync(
        HttpContext ctx,
        ParameterInfo param
    )
    {
        const string searchTermsKey = "searchTerms";
        const string categoryKey = "category";
        const string itemStatesKey = "itemStates";

        var searchTerms = ctx.Request.Query[searchTermsKey]
            .ToString()
            .Trim();

        Category.TryFromName(
            ctx.Request.Query[categoryKey],
            ignoreCase: true,
            out var category
        );

        IEnumerable<ItemState> itemStates = Enumerable.Empty<ItemState>();
        var itemStatesParam = ctx.Request.Query[itemStatesKey].ToString();
        if (!string.IsNullOrEmpty(itemStatesParam))
        {
            itemStates = itemStatesParam
                .Split(',')
                .Select(state => Enum.TryParse(state, out ItemState itemState) ? itemState : (ItemState?)null)
                .Where(state => state.HasValue)
                .Select(state => state.Value)
                .ToList();
        }

        return ValueTask.FromResult<GetItemsQuery?>(new(
            searchTerms,
            category,
            itemStates
        ));
    }
}

 group
            .MapGet(
                "/",
                async (
                    ISender sender,
                    CancellationToken ct,
                    GetItemsQuery qry
                ) => OperationResults.Ok(await sender.Send(
                    qry,
                    ct
                ))
            )
            .WithName("GetListings")
            .WithSummary("Items get operation")
            .WithDescription("")
            .ProducesOperationResult<Paged<ItemDto>>()
            .ProducesOperationResult(StatusCodes.Status400BadRequest);

Exceptions (if any)

No response

.NET Version

9.0

Anything else?

No response

[captainsafia]

Closing as a dupe of #51218.