Fix concurrent read determinism and file descriptor leaks in ArrayRecordDataSource. #542

Job	Run time
call-workflow / Python 3.11 on ubuntu-22.04-arm	3m 50s
call-workflow / Python 3.13 on ubuntu-22.04-arm	9m 24s
call-workflow / Python 3.11 on macos-14	9m 29s
call-workflow / Python 3.13 on ubuntu-22.04	4m 10s
call-workflow / Python 3.11 on ubuntu-22.04	2m 23s
call-workflow / Python 3.14 on ubuntu-22.04-arm	5m 7s
call-workflow / Python 3.12 on ubuntu-22.04-arm	6m 42s
call-workflow / Python 3.14 on ubuntu-22.04	5m 56s
call-workflow / Python 3.12 on ubuntu-22.04	8m 6s
call-workflow / Python 3.14 on macos-14	6m 32s
call-workflow / Python 3.12 on macos-14	4m 8s
call-workflow / Python 3.13 on macos-14	1m 33s
call-workflow / publish-wheel	0s
	1h 7m 20s

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