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AI-generatedscala.concurrent.Future.firstCompletedOf and java.util.concurrent.Future.cancel timeout integration
Goal is to combine a long-running scala.concurrent.Future with a timeout signal using Future.firstCompletedOf, where the timeout future completes with a failure after a fixed duration. The pattern is intended to work across Scala 2.13 and Scala 3 standard library. Constraints involve reliance on the underlying Executor for scheduling the timeout future, and