Search right after adding doesn't return the added items. Fix this later, it's j...

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https://github.com/tryAGI/LangChain/blob/03110ccdfc74d2a4bdace3575a52b97c15d6f595/src/Databases/OpenSearch/src/OpenSearchVectorCollection.cs#L52

            throw new InvalidOperationException($"Failed to add items to collection '{Name}'. DebugInformation: {response.DebugInformation}");
        }

        // TODO: Search right after adding doesn't return the added items. Fix this later, it's just a temporary solution. 
        await Task.Delay(TimeSpan.FromMilliseconds(1000), cancellationToken).ConfigureAwait(false);

        return response.Items
            .Select(i => i.Id)
            .ToArray();