Phase 1a: Kernel infrastructure + HC2/Bell-McCaffrey variance #1176

Job	Run time
Pure Python Fallback	1h 7m 32s
Rust Unit Tests (ubuntu-24.04-arm)	1m 29s
Rust Unit Tests (ubuntu-latest)	1m 19s
Rust Unit Tests (macos-latest)	1m 34s
Rust Unit Tests (windows-latest)	2m 47s
Python Tests (macos-latest, py3.13)	21m 39s
Python Tests (windows-latest, py3.14)	38m 28s
Python Tests (ubuntu-latest, py3.14)	39m 19s
Python Tests (macos-latest, py3.11)	19m 10s
Python Tests (macos-latest, py3.14)	20m 11s
Python Tests (ubuntu-latest, py3.13)	46m 14s
Python Tests (ubuntu-latest, py3.11)	40m 36s
Python Tests (ubuntu-24.04-arm, py3.11)	24m 28s
Python Tests (ubuntu-24.04-arm, py3.13)	25m 24s
Python Tests (ubuntu-24.04-arm, py3.14)	25m 31s
Python Tests (windows-latest, py3.11)	40m 4s
Python Tests (windows-latest, py3.13)	35m 19s
	7h 31m 4s

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