perf(linalg): scores-based CR2 Bell-McCaffrey DOF (algebraic identity; PT2018 §3.1 Satterthwaite) #2886

Job	Run time
Pure Python Fallback	1h 26m 40s
Python Tests (windows-latest, py3.11)	55m 48s
Rust Unit Tests (ubuntu-latest)	1m 22s
Rust Unit Tests (ubuntu-24.04-arm)	1m 31s
Python Tests (ubuntu-latest, py3.13)	1h 0m 8s
Python Tests (ubuntu-latest, py3.14)	1h 0m 23s
Rust Unit Tests (macos-latest)	2m 9s
Rust Unit Tests (windows-latest)	2m 17s
Python Tests (macos-latest, py3.11)	34m 53s
Python Tests (windows-latest, py3.13)	58m 32s
Python Tests (ubuntu-latest, py3.11)	55m 24s
Python Tests (macos-latest, py3.14)	37m 37s
Python Tests (macos-latest, py3.13)	34m 31s
Python Tests (ubuntu-24.04-arm, py3.13)	30m 3s
Python Tests (windows-latest, py3.14)	56m 59s
Python Tests (ubuntu-24.04-arm, py3.14)	29m 49s
Python Tests (ubuntu-24.04-arm, py3.11)	31m 10s
	10h 39m 16s

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