Task 527: Add powered_flyby WASM Test

Status: DONE

Summary

Add TS-side WASM test for powered_flyby — the only WASM export without a corresponding test in wasm.test.ts. The function computes a powered flyby (Oberth burn at periapsis), used in EP05 Jupiter flyby analysis.

Tests to Add

powered_flyby (2 assertions)

• v_inf_out > v_inf_in (powered burn increases hyperbolic excess velocity)
• Output direction is a unit vector and differs from input direction

Impact

Closes the last WASM TS-side test coverage gap. All 104 WASM exports now have TS tests.