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Btw, this is the fix for the Ephemeral Mode Race Coding for me so far, in orchestration.py:  if not api and PREFECT_SERVER_ALLOW_EPHEMERAL_MODE:
        # create an ephemeral API if none was provided
        from prefect.server.api.server import SubprocessASGIServer

        server = SubprocessASGIServer()
        import time
        time.sleep(1)
        server.start()
        assert server.server_process is not None, "Server process did not start"

        api = server.api_url
        server_type = ServerType.EPHEMERAL