```json { "table_name": "schema_migrations", "table_type_tags": [ {"tag": "dimension", "confidence": 0.90}, {"tag": "path", "confidence": 0.15} ], "primary_type": "dimension", "insufficient_evidence": false, "entity": { "columns": ["version"], "unique_per_row": true }, "time_axis": { "columns": ["applied_at"], "kind": "event_time" }, "reasoning": "The entity version is unique per row (Uniqueness 1.000, RPUV 1.00, Monotonicity 1.000), making each row describe one migration. The applied_at timestamp (also Uniqueness 1.000) is an attribute recording when that migration was applied, not an axis ordering repeated actions of a migration. This is a catalog of migration occurrences with unique IDs — dimension. The provenance columns (_ingestion_timestamp, _batch_id, _source_file, _source_system) are ignored per instructions." } ```