fix: add thread safety to navigation and localization providers

[Wanbogang]

Summary

Add threading.Lock to three Unitree providers to prevent race conditions
between Zenoh callback threads and the main thread accessing shared state.

Changes

src/providers/unitree_go2_navigation_provider.py

• Add threading.Lock to protect _nav_in_progress, _current_destination, and navigation_status
• Add lock to properties navigation_state and is_navigating

src/providers/unitree_g1_navigation_provider.py

• Add threading.Lock to protect _nav_in_progress, _current_destination, and navigation_status
• Add lock to properties navigation_state and is_navigating
• Fix indentation in navigation_status_message_callback

src/providers/unitree_go2_lidar_localization_provider.py

• Add threading.Lock to protect localization_status and localization_pose
• Add lock to properties is_localized and pose
• Remove duplicate self._lock initialization

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

📢 Thoughts on this report? Let us know!