Add survey-aware DiD tutorial (Phase 7c) #703

Job	Run time
Rust Unit Tests (ubuntu-24.04-arm)	1m 37s
Rust Unit Tests (macos-latest)	1m 11s
Python Tests (windows-latest, py3.11)	38m 12s
Pure Python Fallback	59m 35s
Python Tests (macos-latest, py3.13)	18m 34s
Rust Unit Tests (windows-latest)	3m 2s
Python Tests (ubuntu-24.04-arm, py3.13)	18m 42s
Python Tests (windows-latest, py3.13)	39m 8s
Python Tests (ubuntu-latest, py3.11)	39m 56s
Python Tests (macos-latest, py3.11)	14m 57s
Rust Unit Tests (ubuntu-latest)	1m 30s
Python Tests (ubuntu-24.04-arm, py3.11)	18m 26s
Python Tests (ubuntu-latest, py3.13)	40m 14s
	4h 55m 4s

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