Key PointsThe contracted backlog hit $553 billion in the most recent quarter, up 325% from a year earlier.A roughly $300 billion deal with OpenAI accounts for much of that backlog -- and likely much of the recent pain for investors.The cloud and artificial intelligence build-out is being financed with tens of billions of dollars in fresh debt.10 stocks we like better than Oracle › The market's enthusiasm for artificial intelligence (AI) has lift…