feat(qlik): drop network rupture% metric and the "Sans vente 6 mois" grid tab

Stock Rupture % N saturated at 100% for high-presence products (degenerate
at the article x network grain), so remove it end to end: config id,
NetworkMetric, hypercube (width 8->7), cache, schema, enrich and grid
column. db-init drops the column on existing DBs.

Also remove the "Sans vente 6 mois" tab from the grid page: the grid now
renders directly without the tab switcher; delete the NoSalesTab component.
(The separate Stock negatif page keeps its own sans-vente tabs.)

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

src/db/schema.ts

@@ -123,8 +123,6 @@ export const qlikNetworkMetrics = pgTable("qlik_network_metrics", {
   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 */