Refactor configuration and update test structure for improved clarity

- Updated `.gitignore` to remove committed test fixture data exclusions.
- Increased batch size in `config.test.yaml` from 4 to 128 for training.
- Simplified directory structure in `config.yaml` by removing unnecessary data paths.
- Adjusted paths in `augmentation.py`, `dataset-visualiser.py`, and `exports.py` to align with the new configuration structure.
- Enhanced `annotation_queue_handler.py` to utilize the updated configuration for directory management.
- Added CSV logging of test results in `conftest.py` for better test reporting.

These changes streamline the configuration management and enhance the testing framework, ensuring better organization and clarity in the project.

.gitignore

@@ -25,7 +25,3 @@ venv
 
 # Test results
 tests/test-results/
-
-# Test fixture data — override global ignores for committed test data
-!tests/root/
-!tests/root/**