I need to determine the time period coverage. Let me first check what temporal columns exist in the main tables, since my initial query failed. {"action": "tool_call", "reasoning": "The dataset card shows 43 tables with 2,039,355 total rows. I already have row and column counts from step-0. Now I need to find temporal coverage. Since 'created_at' doesn't exist, I'll inspect the batches table (which likely has temporal data based on the gold table names mentioning started_at and completed_at) to find the actual temporal column names.", "tool": "inspect_columns", "args": {"table": "batches"}}