fix: robustify suspended product filter using ::text cast

The previous ::boolean cast caused query failure when suspendu column
is not a native boolean type. Casting to ::text first handles all
column types (char, varchar, int, boolean).

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

src/lib/pg-ff-client.ts

@@ -151,8 +151,8 @@ export async function pgGetArticlesByFournisseur(codefou: string): Promise<PgArt
         ) last_fournisseur ON true
         WHERE af.code = ${codefou}
           AND a.codein IS NOT NULL
-          AND NOT COALESCE(af.suspendu::boolean, false)
-          AND NOT COALESCE(a.suspendu::boolean, false)
+          AND (af.suspendu IS NULL OR af.suspendu::text NOT IN ('1', 'true', 't', 'yes', 'y', 'on'))
+          AND (a.suspendu IS NULL OR a.suspendu::text NOT IN ('1', 'true', 't', 'yes', 'y', 'on'))
         ORDER BY a.no_id, af.no_id
     `);