Potential fix for code scanning alert no. 7: Information exposure through an exception

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: GitTimeraider

app/directadmin_api.py

@@ -495,7 +495,7 @@ def delete_forwarder(self, address):
 
         except Exception as e:
             print(f"Error deleting forwarder: {e}")
-            return False, str(e)
+            return False, "An error occurred while deleting the forwarder"
 
     def validate_email(self, email):
         """Basic email validation"""