fix: use most recent artfou1 entry (no_id DESC) for supplier attribution

DISTINCT ON with ORDER BY no_id ASC was picking the oldest supplier entry
(BAZAR 5000 historically), attributing CA to a supplier the store no longer
uses. Changing to DESC picks the most recently inserted artfou1 row, which
represents the current active supplier for each article.

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

src/lib/pg-ff-client.ts

@@ -646,10 +646,11 @@ export async function pgGetCaByFournisseur(
 ): Promise<CaByFournisseurRow[]> {
     const result = await pgNoParallel(sql`
         WITH art_fou AS (
-            -- Un seul fournisseur par article (le plus ancien no_id = fournisseur principal)
+            -- Un seul fournisseur par article : le plus récent (no_id DESC = entrée courante)
+            -- no_id est une séquence croissante → DESC sélectionne le fournisseur actif actuel
             SELECT DISTINCT ON (art_no_id) art_no_id, code AS codefou
             FROM artfou1
-            ORDER BY art_no_id, no_id
+            ORDER BY art_no_id, no_id DESC
         )
         SELECT
             af.codefou                         AS code,