Test

Various minor improvements before releasing version 3.3.1+ #704

Job	Run time
Python 3.8, Database sqlite	59s
Python 3.8, Database postgres	1m 2s
Python 3.9, Database sqlite	1m 4s
Python 3.9, Database postgres	1m 3s
Python 3.10, Database sqlite	1m 42s
Python 3.10, Database postgres	1m 42s
Python 3.11, Database sqlite	1m 22s
Python 3.11, Database postgres	1m 12s
Python 3.12, Database sqlite	1m 13s
Python 3.12, Database postgres	1m 9s
Python pypy-3.9, Database sqlite	2m 25s
Python pypy-3.9, Database postgres	1m 49s
Python pypy-3.10, Database sqlite	2m 29s
Python pypy-3.10, Database postgres	1m 45s
	20m 56s

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