Added 7 TDD tests for Feature 2 (geographic efficiency / anti-backtracking):
- Route must start at specified start city
- Route must end at specified end city
- Intermediate games in wrong order rejected or reordered
- Multiple route options - least backtracking preferred
- Minor backtracking within tolerance is acceptable
- Excessive backtracking beyond destination rejected
- Correct directional classification for north-to-south route
All tests pass - existing ScenarioCPlanner implementation already
validates monotonic progress and prevents excessive backtracking.
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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