- Introduce ORBITAL_PERIOD_SCALE = 4.0 multiplier so planets/stations/
gas clouds/anomalies all orbit visibly slower. At inspection-scale
zoom the un-scaled periods (≈2.5s per unit of radius) made bodies
spin like tops; tuned for a calm browsing pace.
- Default Orbit angular_velocity 0.5 → 0.15 (≈40s per revolution).
- Update orbital_period unit tests for the new scale factor.