Add v4 pytest markers and TODO in documentation #571

Job	Run time
mypy	3m 25s
py3.13 \| macos \| integration tests	13m 29s
py3.13 \| macos \| unit tests	8m 8s
py3.13 \| ubuntu \| integration tests	14m 21s
py3.13 \| ubuntu \| unit tests	10m 5s
py3.13 \| windows \| integration tests	25m 41s
py3.13 \| windows \| unit tests	14m 1s
py3.10 \| ubuntu \| integration tests	13m 44s
py3.10 \| ubuntu \| unit tests	11m 1s
py3.11 \| ubuntu \| unit tests	10m 35s
py3.12 \| ubuntu \| unit tests	10m 39s
merge-test-artifacts	3s
	2h 15m 12s

Provide feedback