Change API for EAD items to support large numbers #268

Job	Run time
Build wheels on ubuntu-latest with Python pypy3.10	58s
Build wheels on ubuntu-latest with Python 3.10	53s
Build wheels on ubuntu-latest with Python 3.11	1m 11s
Build wheels on ubuntu-latest with Python 3.12	54s
Build wheels on ubuntu-latest with Python 3.13	52s
Build wheels on windows-latest with Python pypy3.10	4m 46s
Build wheels on windows-latest with Python 3.10	4m 39s
Build wheels on windows-latest with Python 3.11	4m 22s
Build wheels on windows-latest with Python 3.12	6m 11s
Build wheels on windows-latest with Python 3.13	2m 50s
Build wheels on macos-13 with Python pypy3.10	1m 35s
Build wheels on macos-13 with Python 3.10	1m 54s
Build wheels on macos-13 with Python 3.11	1m 33s
Build wheels on macos-13 with Python 3.12	1m 47s
Build wheels on macos-13 with Python 3.13	1m 31s
release	0s
	35m 56s

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