Add doubly robust covariates path to EfficientDiD #490

Job	Run time
Pure Python Fallback	44m 14s
Rust Unit Tests (windows-latest)	2m 0s
Rust Unit Tests (ubuntu-24.04-arm)	1m 35s
Rust Unit Tests (ubuntu-latest)	1m 16s
Python Tests (macos-latest, py3.11)	15m 23s
Rust Unit Tests (macos-latest)	1m 34s
Python Tests (ubuntu-latest, py3.13)	39m 45s
Python Tests (ubuntu-24.04-arm, py3.13)	18m 7s
Python Tests (windows-latest, py3.11)	35m 23s
Python Tests (windows-latest, py3.13)	39m 40s
Python Tests (macos-latest, py3.13)	14m 50s
Python Tests (ubuntu-latest, py3.11)	38m 36s
Python Tests (ubuntu-24.04-arm, py3.11)	17m 53s
	4h 30m 16s

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