JWT auth + RLS is the real security boundary. IP check was blocking legitimate
dashboard users accessing via Cloudflare tunnel (X-Forwarded-For = real user IP,
not 127.0.0.1). Added /api/internal/demand/stock-analysis: demand × live stock
combined analysis with reorder_urgency, coverage_days_de, momentum_ratio.
Dashboard: new Demand × Live Stock Analyse panel with critical/low/ok/overstock chips.