Black Friday Dashboards Get Built in June, Not November
A useful Black Friday war-room dashboard in Claude Desktop needs sub-minute data latency — live revenue, ROAS by campaign, real-time stockout flags. WooCommerce stores running 15-minute ETL polling cannot deliver this. Migrating from polling to BigQuery streaming takes six to eight weeks plus stability time, which means the dashboard that works in November was decided in June. By July 2026 a streaming pipeline needs four clean months of history to compare BFCM 2026 against, or there is nothing to alert on.