Task 485: Add EP05 Analysis-Derived Cross-Checks

Status: DONE

Summary

EP05 article content validation uses only 1 analysis-derived cross-check (nozzleLifespan.marginMinutes). EP01-EP04 all have Hohmann baseline and other key values cross-checked via assertContainsApproxValue. EP05 is missing:

• Hohmann baseline (totalDvKms, transferTimeYears) — cross-checked for EP01-EP04 but not EP05
• Oberth effect: threePercentBurnSavingMinutes — the 99-min burn saving
• Earth approach: dvCaptureLEOKms — the 3.18 km/s value
• Brachistochrone by mass: 300t scenario peak velocity

Plan

1. Add assertContainsApproxValue cross-checks for EP05 Hohmann, Oberth, earth approach, and brachistochrone values
2. Verify all tests pass
3. Commit

Impact

• Completes analysis-derived cross-check coverage for all 5 episodes
• Catches report-analysis drift for EP05's key derived values