{"database": "database", "table": "export_metadata", "rows": [["generated_at", "2026-06-28T00:00:00.085Z"]], "columns": ["key", "value"], "primary_keys": ["key"], "primary_key_values": ["generated_at"], "units": {}, "query_ms": 0.7688687182962894, "source": "BookWalker (ZSTD-compressed Database Export)", "source_url": "https://static.bookwalker.com/data/bkwk-db.sqlite.zst", "license": "BookWalker Data Export License", "license_url": "https://static.bookwalker.com/legal/data-tos.html"}