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/db/schema.ts

@@ -117,6 +117,14 @@ export const qlikNetworkMetrics = pgTable("qlik_network_metrics", {
   qteReseau: numeric("qte_reseau", { precision: 14, scale: 2 }),
   /** Nombre de magasins travaillant le produit (sur ~270) */
   nbMagasinsReseau: integer("nb_magasins_reseau"),
+  /** CA moyen par magasin (productivité normalisée présence) */
+  caParMagasinReseau: numeric("ca_par_magasin_reseau", { precision: 16, scale: 2 }),
+  /** Couverture de stock en quantité (rotation) */
+  couvertureStockReseau: numeric("couverture_stock_reseau", { precision: 12, scale: 3 }),
+  /** Taux de marge réseau (ratio brut Qlik) */
+  margePctReseau: numeric("marge_pct_reseau", { precision: 8, scale: 4 }),
+  /** Taux de rupture réseau (ratio brut Qlik) */
+  rupturePctReseau: numeric("rupture_pct_reseau", { precision: 8, scale: 4 }),
   /** Période couverte (libre, ex "12m" ou "2025") */
   periode: varchar("periode", { length: 20 }),
   /** Dernière synchro depuis Qlik */