Adds src/ (scripts, raw measurement logs, derived data, report source),
tests/, LICENSE (MIT, code) and LICENSE-DATA.md (CC BY 4.0 for the survey's
data; third-party terms). The report is updated to the current site; the
v1 and v2 data hand-off files are unchanged.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>