fix: dedupe foucad rows by foucode before full refresh

The source MSSQL FOUCAD table can return several rows for the same
FOUCODE, but the PostgreSQL foucad table uses foucode as PRIMARY KEY.
The bulk INSERT in fullRefresh has no conflict handling, so duplicate
FOUCODE values triggered:

  duplicate key value violates unique constraint "foucad_pkey"

Deduplicate by foucode before insert, keeping the most recently
modified row (suividatemodif). Routes join foucad 1:1 on foucode, so
one config row per supplier code is the intended shape.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011ad1qwhDEHNniSUDveTQHL

sync/tables/appro.js

@@ -171,7 +171,19 @@ async function syncAppro(force) {
       suividatemodif:    r.SUIVIDATEMODIF,
     }));
 
-    const count = await fullRefresh(pg, 'foucad', rows, FOUCAD_COLS);
+    // foucode est PK côté PostgreSQL mais la source FOUCAD peut renvoyer
+    // plusieurs lignes par FOUCODE → on déduplique en gardant la plus récente
+    // (suividatemodif), sinon l'INSERT viole foucad_pkey.
+    const byCode = new Map();
+    for (const row of rows) {
+      const prev = byCode.get(row.foucode);
+      if (!prev || (row.suividatemodif ?? 0) >= (prev.suividatemodif ?? 0)) {
+        byCode.set(row.foucode, row);
+      }
+    }
+    const dedupRows = [...byCode.values()];
+
+    const count = await fullRefresh(pg, 'foucad', dedupRows, FOUCAD_COLS);
     await logSync(pg, 'foucad', count, 'ok');
     console.log(`[foucad] ${count} lignes`);
   } catch (err) {