Add fragmentation test #9498

Job	Run time
Lints and doc tests on ubuntu-latest	11m 32s
Unit tests on ubuntu-latest	22m 57s
Lints and doc tests on windows-latest	17m 37s
Typos Check	9s
Unit tests on windows-latest	33m 23s
Lints and doc tests on macos-13	17m 13s
Unit tests on macos-13	18m 16s
Lints and doc tests on macos-14	6m 24s
Unit tests on macos-14	13m 54s
Memory leak checks	3m 46s
CI status checks	1s
	2h 25m 12s

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