eval_baseline.py: read_meta undefined in test dataloader

[kmatzen]

Running moge/scripts/eval_baseline.py with configs/eval/benchmarks/diode.json and baselines/da_v2.py fails:

File "moge/test/dataloader.py", line 96, in _load_instance
    meta = read_meta(Path(path, 'meta.json'))
NameError: name 'read_meta' is not defined

moge/train/dataloader.py uses read_json for the same path; moge/utils/io.py defines read_json but not read_meta.

Suggested fix: read_meta → read_json in moge/test/dataloader.py.

Note: a PyPI package named pipeline in the same venv can shadow MoGe's import pipeline in the test dataloader.