```json { "table_name": "column_tag_overrides", "primary_key": "id", "candidates": [ { "rank": 0, "partition_key": "id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "id is the unique identifier with RPUV=1.00 and uniqueness=1.000, serving as the primary key for this dimension table. Each row represents a distinct override record.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require clustering keys as they are reference data without internal ordering requirements.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a metadata dimension table tracking manual column tag overrides. With only 2 rows, it's a small reference table. The id column is the natural primary key. The changed_at timestamp indicates when overrides were made but doesn't warrant clustering in a dimension context." } ] } ```