docs: add SpaceOps Lab contract packet

[yangfei222666-9]

Summary

• Add SpaceOps Lab simulation-only contract packet.
• Add Mars Rover simulation request schema and sample request.
• Add tests locking boundary flags and no-fake-success closeout rules.

Verification

• python3 -m json.tool examples/mars_rover_mission_request.json
• PYTHONDONTWRITEBYTECODE=1 pytest -p no:cacheprovider tests/test_spaceops_lab_contract.py -q
• git diff --check

Boundaries

• Contract/test packet only.
• No real vehicle, satellite, radio, robot, drone, broker, provider, secret, trade, paper-buy, promotion, or judgment authority.
• No SpaceX acceptance, production readiness, or real hardware control claim.