Fix concurrent read determinism and file descriptor leaks in ArrayRecordDataSource. #553

Job	Run time
call-workflow / Python 3.11 on ubuntu-22.04	3m 46s
call-workflow / Python 3.13 on macos-14	2m 46s
call-workflow / Python 3.12 on ubuntu-22.04	10m 0s
call-workflow / Python 3.11 on macos-14	4m 24s
call-workflow / Python 3.13 on ubuntu-22.04-arm	8m 41s
call-workflow / Python 3.12 on ubuntu-22.04-arm	8m 2s
call-workflow / Python 3.11 on ubuntu-22.04-arm	1m 55s
call-workflow / Python 3.12 on macos-14	2m 2s
call-workflow / Python 3.13 on ubuntu-22.04	4m 44s
call-workflow / Python 3.14 on ubuntu-22.04-arm	5m 59s
call-workflow / Python 3.14 on ubuntu-22.04	5m 16s
call-workflow / Python 3.14 on macos-14	3m 11s
call-workflow / publish-wheel	-1s
	1h 0m 45s

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