Fix concurrent read determinism and file descriptor leaks in ArrayRecordDataSource. #545

Job	Run time
call-workflow / Python 3.11 on ubuntu-22.04-arm	8m 27s
call-workflow / Python 3.12 on macos-14	5m 2s
call-workflow / Python 3.12 on ubuntu-22.04	3m 58s
call-workflow / Python 3.11 on macos-14	5m 16s
call-workflow / Python 3.13 on ubuntu-22.04	5m 13s
call-workflow / Python 3.13 on macos-14	2m 19s
call-workflow / Python 3.11 on ubuntu-22.04	3m 41s
call-workflow / Python 3.12 on ubuntu-22.04-arm	8m 5s
call-workflow / Python 3.14 on ubuntu-22.04	4m 27s
call-workflow / Python 3.14 on ubuntu-22.04-arm	6m 20s
call-workflow / Python 3.13 on ubuntu-22.04-arm	8m 57s
call-workflow / Python 3.14 on macos-14	3m 6s
call-workflow / publish-wheel	0s
	1h 4m 51s

Provide feedback