test

maint: convert to cached_property and other minor refactors #2961

Job	Run time
Downstream builds with Python 3.8	34s
Downstream builds with Python 3.9	36s
Python 3.8 on Linux	9s
Downstream builds with Python 3.10	38s
Python 3.9 on Linux	8s
Python 3.10 on Linux	9s
Downstream builds with Python 3.11	34s
Python 3.11 on Linux	8s
Downstream builds with Python 3.12	38s
Downstream builds with Python 3.13	47s
Python 3.12 on Linux	11s
Python 3.13 on Linux	15s
Python 3.8 on Windows	28s
Python 3.9 on Windows	37s
Python 3.10 on Windows	29s
Python 3.11 on Windows	20s
Python 3.12 on Windows	20s
Python 3.13 on Windows	1m 16s
Python 3.8 on macOS	59s
Python 3.9 on macOS	27s
Python 3.10 on macOS	27s
Python 3.11 on macOS	12s
Python 3.12 on macOS	13s
Python 3.13 on macOS	12s
Report coverage	0s
check	4s
	10m 51s

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