Add LPDiD complex-survey-design support (Phase D1) #2553

Job	Run time
Python Tests (windows-latest, py3.11)	1h 0m 15s
Python Tests (ubuntu-24.04-arm, py3.13)	36m 58s
Python Tests (ubuntu-24.04-arm, py3.11)	42m 21s
Python Tests (ubuntu-latest, py3.14)	1h 5m 37s
Pure Python Fallback	1h 14m 1s
Rust Unit Tests (ubuntu-24.04-arm)	1m 25s
Rust Unit Tests (ubuntu-latest)	1m 22s
Python Tests (ubuntu-latest, py3.13)	58m 45s
Python Tests (ubuntu-latest, py3.11)	1h 2m 1s
Rust Unit Tests (windows-latest)	2m 41s
Rust Unit Tests (macos-latest)	1m 58s
Python Tests (windows-latest, py3.14)	43m 33s
Python Tests (windows-latest, py3.13)	1h 1m 34s
Python Tests (ubuntu-24.04-arm, py3.14)	37m 18s
Python Tests (macos-latest, py3.14)	30m 21s
Python Tests (macos-latest, py3.11)	38m 41s
Python Tests (macos-latest, py3.13)	38m 0s
	10h 56m 51s

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