Potential fix for code scanning alert no. 11: Information exposure through an exception

[GitTimeraider]

Potential fix for https://github.com/GitTimeraider/Directadmin-Emailforwarder/security/code-scanning/11

To fix the problem, we need to ensure that the test_connection() method in DirectAdminAPI (app/directadmin_api.py) does not return exception details to the caller. Instead, it should return a generic error message when an exception occurs, and log the detailed error server-side. Specifically, in the except Exception as e: block (line 169), replace return False, f"Connection error: {str(e)}" with return False, "Connection error: Unable to connect to DirectAdmin." and log the exception using traceback.print_exc() or similar. This change ensures that the user-facing API in app/settings.py only receives a generic error message, preventing information exposure.

Files/regions to change:

• app/directadmin_api.py: In the test_connection() method, update the exception handler to return a generic error message and log the detailed error.
• No changes are needed in app/settings.py, as the message returned from test_connection() will now be safe.

Methods/imports/definitions needed:

• Ensure that traceback is imported in app/directadmin_api.py (already present).
• No new dependencies are required.

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