- Update image saving path in ImageSubscriber class
- Remove unused imports and code related to task_4 and arrow detection
- Add import for run_task_test
- Comment out run_task_4 and uncomment run_task_test in main function
- Comment out angle correction logic in go_straight function
- Adjust go_straight parameters in task_1
- Add success message for horizontal line calibration
- Update main function to include task_test
- Modify marker request response format