fix remote dataset info

[xzrderek]

Note

Preserves and merges input_metadata.dataset_info during remote trace updates, with tests ensuring metadata survives and includes expected fields.

• Tracing utils:
  • Update update_row_with_remote_trace in eval_protocol/pytest/tracing_utils.py to merge remote_row.input_metadata.dataset_info into existing row.input_metadata.dataset_info (initialize if None, add missing keys without overwriting existing ones).
• Tests:
  • Enhance tests/remote_server/test_remote_fireworks.py:
    • Seed local rows with dataset_info via rows().
    • Assert preservation of dataset_info fields and presence of added fields (data_loader_type, data_loader_num_rows).
    • Additional assertions for completion_params.model, temperature, and row_id.

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