Checkpoint: Purge automatique des tombstones (processed_dedup_keys) de plus de 6 mois :

- purgeOldArticles dans db.ts : suppression des entrées processedDedupKeys.processedAt <= cutoff 6 mois
- Logs cron et init mis à jour pour afficher le nombre de tombstones supprimés
- 0 erreur TypeScript

server/db.ts

@@ -14,6 +14,7 @@ import {
   InsertIdea,
   rssFeeds,
   rssSettings,
+  processedDedupKeys,
   type InsertRssFeed,
   type InsertRssSettings,
   type ImportLog,
@@ -489,16 +490,21 @@ export async function saveRssSettings(data: Partial<Omit<InsertRssSettings, "id"
 }
 
 // ─── Purge ───────────────────────────────────────────────────────────────────
-export async function purgeOldArticles(retentionMonths: number): Promise<{ veille: number; aap: number }> {
+export async function purgeOldArticles(retentionMonths: number): Promise<{ veille: number; aap: number; tombstones: number }> {
   const db = await getDb();
   if (!db) throw new Error("Database not available");
   const cutoff = new Date();
   cutoff.setMonth(cutoff.getMonth() - retentionMonths);
   const veilleResult = await db.delete(veilleItems).where(lte(veilleItems.importedAt, cutoff));
   const aapResult = await db.delete(aapItems).where(lte(aapItems.importedAt, cutoff));
+  // Purge des tombstones (processed_dedup_keys) de plus de 6 mois
+  const tombstoneCutoff = new Date();
+  tombstoneCutoff.setMonth(tombstoneCutoff.getMonth() - 6);
+  const tombstoneResult = await db.delete(processedDedupKeys).where(lte(processedDedupKeys.processedAt, tombstoneCutoff));
   return {
     veille: (veilleResult as any).affectedRows ?? 0,
     aap: (aapResult as any).affectedRows ?? 0,
+    tombstones: (tombstoneResult as any).affectedRows ?? 0,
   };
 }