Phase 4: Survey support for ImputationDiD, TwoStageDiD, CallawaySantAnna #546

Job	Run time
Rust Unit Tests (ubuntu-24.04-arm)	2m 1s
Rust Unit Tests (macos-latest)	1m 20s
Rust Unit Tests (windows-latest)	2m 5s
Pure Python Fallback	38m 13s
Python Tests (ubuntu-latest, py3.13)	40m 39s
Python Tests (windows-latest, py3.11)	37m 46s
Rust Unit Tests (ubuntu-latest)	1m 16s
Python Tests (macos-latest, py3.13)	17m 41s
Python Tests (ubuntu-24.04-arm, py3.13)	17m 33s
Python Tests (ubuntu-latest, py3.11)	38m 38s
Python Tests (ubuntu-24.04-arm, py3.11)	18m 9s
Python Tests (windows-latest, py3.13)	35m 39s
Python Tests (macos-latest, py3.11)	18m 6s
	4h 29m 6s

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