Add diagnostic tools to view database schema and logs

Integrate a new database debug page for administrators to view database schema, table counts, and relationships, accessible via a new route and sidebar item.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: b163d4c0-de5e-4f4e-a9c0-aed4c7049718
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/1957c339-2757-4d1f-8e92-e9f71a1ce58e/b163d4c0-de5e-4f4e-a9c0-aed4c7049718/xTmsprA

client/src/components/Sidebar.tsx

@@ -149,6 +149,12 @@ export default function Sidebar() {
       icon: Database, 
       roles: ["admin"] 
     },
+    { 
+      path: "/database-debug", 
+      label: "Debug Base de Données", 
+      icon: Database, 
+      roles: ["admin"] 
+    },
   ];
 
   const hasPermission = (roles: string[]) => {