[MINOR] Make deorbit radius configurable

[Mark2000]

Description

Adds deorbit radius to sat args

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How should this pull request be reviewed?

• By commit
• All changes at once

How Has This Been Tested?

Covered by tests.

Future Work

None.

Checklist

• I have performed a self-review of my code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation and release notes
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works

[Copilot]

Pull Request Overview

This PR refactors the altitude validation check to use a configurable minimum orbital radius parameter instead of a hardcoded value, improving flexibility for different mission scenarios.

• Adds min_orbital_radius parameter to setup_spacecraft_hub with default value matching the previous hardcoded limit (200km above Earth's surface)
• Stores the minimum orbital radius as an instance variable for use in validation
• Updates altitude_valid method to use the configurable parameter

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