fix: fix db restore not applying and auto-create USB backup folder

- Reset public schema before psql restore so existing tables don't
  block CREATE TABLE statements (pg_dump without --clean has no DROPs)
- Disconnect Prisma connection pool after restore so next request
  gets fresh connections against the restored data
- Auto-create the USB backup subfolder if it doesn't exist instead
  of failing; only fail if the destination drive itself is missing

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

apps/Backend/src/cron/backupCheck.ts

@@ -111,19 +111,23 @@ export const startBackupCron = () => {
       return;
     }
 
-    const usbBackupPath = path.join(destination.path, USB_BACKUP_FOLDER_NAME);
-
-    if (!fs.existsSync(usbBackupPath)) {
-      const errorMessage = `Folder "${USB_BACKUP_FOLDER_NAME}" not found on the drive.`;
+    if (!fs.existsSync(destination.path)) {
+      const errorMessage = "Backup destination drive not found or disconnected.";
       await cronJobLogStorage.completeJobLog(log.id, "failed", new Date(), errorMessage);
       await storage.createNotification(
         admin.id,
         "BACKUP",
-        `❌ USB backup failed: folder "${USB_BACKUP_FOLDER_NAME}" not found on the drive. Make sure the USB drive is connected and the folder exists.`
+        "❌ USB backup failed: backup drive not found. Make sure the USB drive is connected."
       );
       return;
     }
 
+    const usbBackupPath = path.join(destination.path, USB_BACKUP_FOLDER_NAME);
+
+    if (!fs.existsSync(usbBackupPath)) {
+      fs.mkdirSync(usbBackupPath, { recursive: true });
+    }
+
     try {
       const filename = `dental_backup_usb_${Date.now()}.sql`;
       await backupDatabaseToPath({ destinationPath: usbBackupPath, filename });