I need to identify the most important metric and category in this dataset, then show how they relate. Let me start by understanding what metrics and categories are available. {"action": "tool_call", "reasoning": "The overview shows beer_ratings is the dominant table (85% of data, 14.3M rows). I need to understand what metrics it contains and what categories would be meaningful for analysis. Let me inspect the beer_ratings table structure to see what metrics are available.", "tool": "inspect_columns", "args": {"table": "beer_ratings"}}