Add support for actfast lenient mode (#281) #1229

Job	Run time
mypy	47s
ruff	18s
unit (ubuntu-latest, 3.11, lowest-direct)	1m 44s
unit (ubuntu-latest, 3.10, lowest-direct)	46s
unit (ubuntu-latest, 3.12, highest)	52s
unit (windows-latest, 3.11, lowest-direct)	2m 10s
unit (ubuntu-latest, 3.10, highest)	44s
unit (windows-latest, 3.10, lowest-direct)	1m 57s
unit (windows-latest, 3.11, highest)	1m 54s
unit (ubuntu-latest, 3.11, highest)	49s
unit (ubuntu-latest, 3.13, highest)	46s
unit (windows-latest, 3.10, highest)	2m 5s
unit (macos-latest, 3.10, lowest-direct)	1m 58s
unit (windows-latest, 3.13, highest)	1m 57s
unit (windows-latest, 3.13, lowest-direct)	1m 48s
unit (ubuntu-latest, 3.12, lowest-direct)	52s
unit (macos-latest, 3.12, highest)	1m 10s
unit (macos-latest, 3.13, lowest-direct)	41s
unit (windows-latest, 3.12, lowest-direct)	1m 40s
unit (macos-latest, 3.11, highest)	58s
unit (macos-latest, 3.12, lowest-direct)	50s
unit (ubuntu-latest, 3.13, lowest-direct)	46s
unit (macos-latest, 3.10, highest)	1m 32s
unit (windows-latest, 3.12, highest)	2m 10s
unit (macos-latest, 3.11, lowest-direct)	47s
unit (macos-latest, 3.13, highest)	55s
	32m 56s

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