fix(test): revert black formatting and remove unused import

- Revert excessive black formatting changes from previous commit
- Remove unused harbor_url import from test_robot_account.py
- Preserve test_03_SystemRobotCreatesProjectRobot functionality
- Maintain original project formatting style for maintainer review

This addresses maintainer feedback to undo black formatting while
keeping functional improvements and the new integration test intact.

Author: Quantum-Sicarius