Test

Improve docstrings of `build`/`create` classmethods #653

Job	Run time
Python 3.8, Database sqlite	1m 34s
Python 3.8, Database postgres	1m 28s
Python 3.9, Database sqlite	1m 37s
Python 3.9, Database postgres	1m 35s
Python 3.10, Database sqlite	2m 22s
Python 3.10, Database postgres	2m 16s
Python 3.11, Database sqlite	1m 44s
Python 3.11, Database postgres	1m 42s
Python 3.12, Database sqlite	1m 39s
Python 3.12, Database postgres	1m 25s
Python pypy-3.9, Database sqlite	3m 19s
Python pypy-3.9, Database postgres	2m 27s
Python pypy-3.10, Database sqlite	3m 23s
Python pypy-3.10, Database postgres	2m 30s
	29m 1s

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