Adds an "E2E Test Harness (Public UAV Datasets)" subsection to
§Testing Strategy explaining the three-tier adapter layout and
pointing readers at testing/README.md for architecture and ADR 0001
for selection rationale. Updates Related Artifacts to list the new
in-repo docs. next_steps.md cross-links the ADR as the authoritative
decision record (brainstorm drafts stay local).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Yuzviak