```json { "table_name": "report_charts", "table_type_tags": [ {"tag": "dimension", "confidence": 0.95} ], "primary_type": "dimension", "insufficient_evidence": false, "entity": { "columns": ["jobs_id", "chart_id"], "unique_per_row": true }, "time_axis": null, "reasoning": "The composite entity (jobs_id, chart_id) is unique per row — jobs_id RPUV 3.96 × chart_id RPUV 65.57 yields ~259, plausibly ≥ 459 rows given overlap. Each row describes a chart artifact (bytes, title, caption) generated for a specific job. No time axis exists beyond the provenance _ingestion_timestamp. The table catalogs chart outputs, with each (job, chart_type) combination appearing once: dimension." } ```