Add zambezi_nyanja test metrics

eval/zambezi/test/maxdur30_metrics.json

@@ -0,0 +1,28 @@
+{
+  "model_id": "/work/scratch/dohkim/labyrinth/hf_repo_checkouts/ai4good-labyrinth_fleurs-synthetic-hours0p75-whisper-small-no-language",
+  "revision": null,
+  "dataset_source": "/work/courses/ai4good/labyrinth/datasets/zambezi_nyanja/test/dataset",
+  "dataset": "zambezi_nyanja",
+  "dataset_name": "zambezi_voice_nyanja",
+  "language_config": null,
+  "split": "test",
+  "hf_split": "test",
+  "text_column": "transcription",
+  "result_tag": null,
+  "num_examples": 427,
+  "num_examples_loaded": 428,
+  "num_examples_after_max_samples": 428,
+  "num_examples_after_duration_filter": 427,
+  "wer": 0.6230583362098723,
+  "wer_percent": 62.30583362098723,
+  "cer": 0.1544628673550437,
+  "cer_percent": 15.44628673550437,
+  "normalized": true,
+  "min_duration_seconds": 0.0,
+  "max_duration_seconds": 30.0,
+  "language": "auto",
+  "task": "transcribe",
+  "device": "cuda:0",
+  "torch_dtype": "float16",
+  "predictions_csv": "/work/scratch/dohkim/labyrinth/hf_repo_eval_runs/zambezi_nyanja/test/work_scratch_dohkim_labyrinth_hf_repo_checkouts_ai4good-labyrinth_fleurs-synthetic-hours0p75-whisper-small-no-language/predictions.csv"
+}