Merge pull request #311 from igerber/feature/dcdh-survey-variance-ext… #1105

Job	Run time
Pure Python Fallback	1h 8m 3s
Rust Unit Tests (macos-latest)	1m 8s
Rust Unit Tests (ubuntu-latest)	1m 19s
Rust Unit Tests (ubuntu-24.04-arm)	1m 23s
Rust Unit Tests (windows-latest)	2m 40s
Python Tests (windows-latest, py3.13)	34m 56s
Python Tests (windows-latest, py3.11)	37m 41s
Python Tests (ubuntu-latest, py3.13)	40m 1s
Python Tests (macos-latest, py3.13)	17m 46s
Python Tests (ubuntu-latest, py3.11)	35m 37s
Python Tests (ubuntu-24.04-arm, py3.11)	21m 6s
Python Tests (ubuntu-24.04-arm, py3.14)	22m 13s
Python Tests (ubuntu-24.04-arm, py3.13)	22m 10s
Python Tests (windows-latest, py3.14)	35m 8s
Python Tests (macos-latest, py3.11)	18m 32s
Python Tests (macos-latest, py3.14)	17m 56s
Python Tests (ubuntu-latest, py3.14)	39m 43s
	6h 57m 22s

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