Stabilize CI test runs with deterministic environment settings #98

Job	Run time
Discover regression systems	55s
Unit (ubuntu-24.04, 3.13)	50s
Unit (macos-15, 3.14)	1m 9s
Unit (ubuntu-24.04, 3.14)	58s
Unit (macos-15, 3.13)	1m 5s
Unit (macos-15, 3.12)	47s
Unit (windows-2025, 3.12)	1m 45s
Unit (ubuntu-24.04, 3.12)	40s
Unit (windows-2025, 3.14)	1m 53s
Unit (windows-2025, 3.13)	1m 39s
Pre-commit	1m 7s
Coverage	55s
Docs	1m 4s
Regression (fast) • dna	1m 14s
Regression (fast) • benzaldehyde	3m 7s
Regression (fast) • ethyl-acetate	3m 10s
Regression (fast) • methanol	2m 9s
Regression (fast) • cyclohexane	3m 40s
Regression (fast) • water	1m 46s
Regression (fast) • benzene	3m 3s
Regression (fast) • octonol	5m 7s
Regression (fast) • methane	1m 47s
	39m 50s

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