feat: add ranking table sync and API endpoints

Sync Ranking table from SQL Server to PostgreSQL with ranking_ca,
ranking_qte, ranking_mag_* metrics. Expose via /api/ranking and
integrate into /api/articles/:id/referentiel response.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sync/index.js

@@ -7,6 +7,7 @@ const { syncStock }        = require('./tables/stock');
 const { syncMouvements }   = require('./tables/mouvements');
 const { syncCommandes }    = require('./tables/commandes');
 const { syncReferentiel }  = require('./tables/referentiel');
+const { syncRanking }      = require('./tables/ranking');
 const { closeAll }         = require('./db');
 const {
   startDashboard, registerSyncFn,
@@ -24,6 +25,7 @@ const STEPS = [
   { name: 'stock',        fn: syncStock },
   { name: 'mouvements',   fn: syncMouvements },
   { name: 'commandes',    fn: syncCommandes },
+  { name: 'ranking',      fn: syncRanking },
 ];
 
 async function syncAll(force = false) {

sync/tables/ranking.js

@@ -0,0 +1,58 @@
+const { getMssql, getPg } = require('../db');
+const { batchUpsert, logSync, safeStr, safeNum, safeDecimal } = require('../utils');
+
+const COLS = [
+  'gencod', 'site', 'libelle', 'foucentrale', 'nomfoucentrale',
+  'ranking_ca', 'ranking_qte', 'ranking_mag_ca', 'ranking_mag_qte', 'ranking_mag_marge',
+  'pv_calcule', 'pv_mag', 'pv_cen',
+  'codefamille', 'libellefamille', 'fichier',
+  'date_maj', 'date_integration', 'date_calcul_mag',
+];
+
+async function syncRanking(force) {
+  const ms = await getMssql();
+  const pg = getPg();
+
+  try {
+    const res = await ms.request().query(`
+      SELECT GENCOD, SITE, LIBELLE, FOUCENTRALE, NOMFOUCENTRALE,
+             RANKING_CA, RANKING_QTE, RANKING_MAG_CA, RANKING_MAG_QTE, RANKING_MAG_MARGE,
+             PV_CALCULE, PV_MAG, PV_CEN,
+             CODEFAMILLE, LIBELLEFAMILLE, FICHIER,
+             DATE_MAJ, DATE_INTEGRATION, DATE_CALCUL_MAG
+      FROM Ranking
+      WHERE GENCOD IS NOT NULL
+    `);
+
+    const rows = res.recordset.map(r => ({
+      gencod:            safeStr(r.GENCOD),
+      site:              safeStr(r.SITE) || '000',
+      libelle:           safeStr(r.LIBELLE),
+      foucentrale:       safeStr(r.FOUCENTRALE),
+      nomfoucentrale:    safeStr(r.NOMFOUCENTRALE),
+      ranking_ca:        safeNum(r.RANKING_CA),
+      ranking_qte:       safeNum(r.RANKING_QTE),
+      ranking_mag_ca:    safeNum(r.RANKING_MAG_CA),
+      ranking_mag_qte:   safeNum(r.RANKING_MAG_QTE),
+      ranking_mag_marge: safeNum(r.RANKING_MAG_MARGE),
+      pv_calcule:        safeDecimal(r.PV_CALCULE),
+      pv_mag:            safeDecimal(r.PV_MAG),
+      pv_cen:            safeDecimal(r.PV_CEN),
+      codefamille:       safeStr(r.CODEFAMILLE),
+      libellefamille:    safeStr(r.LIBELLEFAMILLE),
+      fichier:           safeStr(r.FICHIER),
+      date_maj:          r.DATE_MAJ || null,
+      date_integration:  r.DATE_INTEGRATION || null,
+      date_calcul_mag:   r.DATE_CALCUL_MAG || null,
+    }));
+
+    const count = await batchUpsert(pg, 'ranking', rows, ['gencod', 'site'], COLS);
+    await logSync(pg, 'ranking', count, 'ok');
+    console.log(`[ranking] ${count} lignes upsert`);
+  } catch (err) {
+    await logSync(pg, 'ranking', 0, 'error', err.message);
+    console.error(`[ranking] ERREUR: ${err.message}`);
+  }
+}
+
+module.exports = { syncRanking };