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.

tests/performance/test_dataset_perf.py

@@ -20,16 +20,16 @@ def _prepare_form_dataset(
     constants_patch(tmp_path)
     import train
 
-    proc_img = Path(c_mod.config.processed_images_dir)
-    proc_lbl = Path(c_mod.config.processed_labels_dir)
-    proc_img.mkdir(parents=True, exist_ok=True)
-    proc_lbl.mkdir(parents=True, exist_ok=True)
+    data_img = Path(c_mod.config.images_dir)
+    data_lbl = Path(c_mod.config.labels_dir)
+    data_img.mkdir(parents=True, exist_ok=True)
+    data_lbl.mkdir(parents=True, exist_ok=True)
 
     imgs = sorted(fixture_images_dir.glob("*.jpg"))[:count]
     for p in imgs:
         stem = p.stem
-        shutil.copy2(fixture_images_dir / f"{stem}.jpg", proc_img / f"{stem}.jpg")
-        dst = proc_lbl / f"{stem}.txt"
+        shutil.copy2(fixture_images_dir / f"{stem}.jpg", data_img / f"{stem}.jpg")
+        dst = data_lbl / f"{stem}.txt"
         shutil.copy2(fixture_labels_dir / f"{stem}.txt", dst)
         if stem in corrupt_stems:
             dst.write_text("0 1.5 0.5 0.1 0.1\n", encoding="utf-8")