```json { "table_name": "neal_probe_runs", "primary_key": "id", "candidates": [ { "rank": 0, "partition_key": "id", "partition_key_label": "primary_identifier", "partition_key_reasoning": "RPUV = 1.00 (perfectly unique), uniqueness = 1.000, top-3 coverage = 0.44%. This is the unique identifier for each probe run execution. As a dimension table, the primary identifier serves as the natural partition key.", "clustering_key": null, "clustering_key_label": null, "clustering_key_reasoning": "Dimension tables typically do not require internal sorting. Each probe run is an independent entity without a natural ordering axis within the table.", "world_line": null, "session_column": null, "confidence": "HIGH", "notes": "This is a dimension table cataloging probe run executions. The id column is the unique identifier (RPUV=1.00, 679 unique values for 679 rows). While created_at, started_at, and finished_at are present as event_time columns, they describe when this dimension entity was created/executed, not a timeline to traverse. The table contains metadata about probe runs (concentration, relationship, duplication, etc.) with status, attempts, findings, and performance metrics. No clustering key is needed for a dimension table of this nature." } ] } ```