Remove auto parsing of int for after/before

[mrahhal]

Today we try to automatically parse the id in after/value as an int:

MR.AspNetCore.Pagination/src/MR.AspNetCore.Pagination/PaginationService.cs

Lines 305 to 329 in 9a9b137

	if (requestQuery.ContainsKey(_options.BeforeQueryParameterName))
	{
	var before = requestQuery[_options.BeforeQueryParameterName][0];
	if (int.TryParse(before, out var beforeIntValue))
	{
	model.Before = beforeIntValue;
	}
	else
	{
	model.Before = before;
	}
	}
	if (requestQuery.ContainsKey(_options.AfterQueryParameterName))
	{
	var after = requestQuery[_options.AfterQueryParameterName][0];
	if (int.TryParse(after, out var afterIntValue))
	{
	model.After = afterIntValue;
	}
	else
	{
	model.After = after;
	}
	}

This is problematic for cases when the id is not an int (maybe a string) but it looks like one. We should completely remove this behavior, the caller should parse the id instead (it'll always be a string now):

await _paginationService.KeysetPaginateAsync(
    query,
    b => b.Descending(x => x.Created),
    async id => await _dbContext.Posts.FindAsync(int.Parse(id)));