HAD Phase 3 follow-up: joint Stute pretest + event-study workflow #1386

Job	Run time
Rust Unit Tests (ubuntu-latest)	1m 27s
Pure Python Fallback	1h 15m 46s
Rust Unit Tests (macos-latest)	1m 43s
Rust Unit Tests (windows-latest)	2m 24s
Rust Unit Tests (ubuntu-24.04-arm)	1m 55s
Python Tests (macos-latest, py3.11)	27m 4s
Python Tests (ubuntu-latest, py3.13)	52m 52s
Python Tests (ubuntu-latest, py3.11)	49m 59s
Python Tests (windows-latest, py3.14)	46m 32s
Python Tests (macos-latest, py3.14)	25m 43s
Python Tests (macos-latest, py3.13)	23m 17s
Python Tests (ubuntu-24.04-arm, py3.11)	36m 16s
Python Tests (windows-latest, py3.11)	44m 58s
Python Tests (windows-latest, py3.13)	45m 2s
Python Tests (ubuntu-latest, py3.14)	52m 11s
Python Tests (ubuntu-24.04-arm, py3.14)	35m 20s
Python Tests (ubuntu-24.04-arm, py3.13)	36m 1s
	9h 18m 30s

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