feat(qlik): extract 4 decision metrics (CA/mag, couverture, marge%, rupture%)

Adds CA par Magasin, Couverture stock Qte, Marge % and Stock Rupture %
network measures to the Qlik hypercube extraction (in-page Playwright ws
+ legacy server ws), persists them in qlik_network_metrics, joins them in
getProductRows and renders 4 new grid columns with buy-signal coloring
(low coverage / high margin = green; high rupture = rose).

- qlik-client: config IDs (env-overridable, master GUIDs of app 9872ee6e),
  NetworkMetric fields, hypercube width 4->8, page height 2500->1250
- qlik-playwright: same 4 measures in the in-page hypercube + row mapping
- schema + db-init: 4 numeric columns (ALTER ADD COLUMN IF NOT EXISTS for
  existing DBs)
- cache + grid types + enrich: plumb the new fields end to end

Note: percent measures stored as raw Qlik ratio; UI renders x100 when |v|<=1.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/types/grid.ts

@@ -113,6 +113,14 @@ export interface ProductRow {
     caReseau?: number;
     qteReseau?: number;
     nbMagasinsReseau?: number;
+    /** CA moyen par magasin réseau (productivité normalisée présence) */
+    caParMagasinReseau?: number;
+    /** Couverture de stock quantité réseau (rotation : bas = tourne vite) */
+    couvertureStockReseau?: number;
+    /** Taux de marge réseau (ratio brut Qlik, ex 0.32 = 32%) */
+    margePctReseau?: number;
+    /** Taux de rupture réseau (ratio brut Qlik, ex 0.05 = 5%) */
+    rupturePctReseau?: number;
     /** Taux de présence réseau = nbMagasinsReseau / 270 */
     tauxPresenceReseau?: number;
     /** Fraîcheur des données réseau (ISO) */