Task 323: RK45 Adaptive Propagation Cross-Validation

Status: DONE

Description

Add cross-validation for the Dormand-Prince RK45 adaptive integrator.

Currently only RK4 fixed-step is cross-validated (single LEO orbit).

The adaptive integrator is the most sophisticated numerical code and is used

for EP02 trim-thrust analysis.

Export RK45 results for:

• LEO circular orbit (10 periods) — compare energy drift vs scipy RK45
• Elliptical orbit — compare final state position/velocity