Task 530: Strengthen Single-Assertion WASM Test Groups

Status: DONE

Summary

Several WASM test groups have only 1 assertion. Add a second test to the 3 highest-value groups to improve regression detection.

Tests to Add

brachistochrone_accel (1 new test)

• EP02 Saturn leg: ~1.28e9 km distance, 87 days — verify different scenario produces different accel

Saturn ring crossing (2 new tests)

• crosses_ring_plane should be true for the straight-down approach test
• approach_angle should be ~90° for straight-down approach

Hohmann window (1 new test)

• Window should be within Earth-Mars synodic period (~780 days)

Impact

Converts 3 schema-only tests into behavior-validating tests.