Add survey design support to EfficientDiD covariates (DR) path #798

Job	Run time
Pure Python Fallback	57m 38s
Rust Unit Tests (macos-latest)	1m 14s
Rust Unit Tests (ubuntu-24.04-arm)	1m 26s
Rust Unit Tests (ubuntu-latest)	1m 14s
Rust Unit Tests (windows-latest)	2m 26s
Python Tests (ubuntu-latest, py3.13)	41m 5s
Python Tests (ubuntu-latest, py3.11)	39m 17s
Python Tests (ubuntu-24.04-arm, py3.11)	18m 57s
Python Tests (windows-latest, py3.11)	36m 3s
Python Tests (macos-latest, py3.11)	17m 35s
Python Tests (macos-latest, py3.13)	17m 44s
Python Tests (ubuntu-24.04-arm, py3.13)	18m 36s
Python Tests (windows-latest, py3.13)	37m 13s
	4h 50m 28s

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