v0.4.4

Restore 36 original source fields across Michigan, BTP 2007, NIC, Denmark, and Tomorrow’s Europe, including previously omitted questionnaire responses. Preserve Michigan’s historical question crosswalk with a PDF companion. Actual contact fields remain excluded with documented reasons.

Add Michigan’s nine-item arrival knowledge measure alongside its existing pre-arrival and exit measures. The 309 observed arrival questionnaires permit matched comparisons across all three stages. Ambiguous text receives no credit; a wholly absent questionnaire remains missing.

Previously published numerical scores, attitudes, attendance, respondent samples, and weights are unchanged. Fifty of 57 generated files remain byte-identical; the other changes contain the new Michigan measurements and updated source or timing provenance.

Validated locally, independently reviewed, and rebuilt from the source archive without Git history or vault files. All 57 rebuilt output files match the tested candidate byte for byte. Detailed evidence and unresolved source questions remain in docs/poll-issues.md.