First Architecture Decision Record for this project. Captures the
rationale for building the e2e harness on VPAIR / MARS-LVIG / EuRoC
rather than blocking on proprietary Mavic data collection; lists
three alternatives considered and why rejected; records the first
real-run baseline (VPAIR ATE ~1770 km) as a measurable starting
point for future VO+ESKF tuning regressions.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>