Enhance WebAuthn handling and error management

- Improve user verification in `authentication.php` by adding a check for user existence and throwing meaningful exceptions for missing users.
- Refactor `webauthn.php` to handle Base64URL decoding and COSE key normalization for consistent WebAuthn library compatibility.
- Extend error logging with additional context for debugging (e.g., public key hex representation).
- Add utility functions for Base64URL decoding and checking PEM/DER format.
- Update `passkeysRoute.php` to normalize public keys and handle errors gracefully during WebAuthn workflows.

services/nginx/app/classes/authentication.php

@@ -74,8 +74,12 @@ class authentication implements authentication_i
     {
         // Create a token
         $token = bin2hex(random_bytes(32));
-        // Get the user id
-        $user_id = (new users_o())->getUserByCustomerNumber($customer_number)->id;
+        // Resolve the user by customer number and ensure it exists to avoid accessing an uninitialized typed property
+        $user = (new users_o())->getUserByCustomerNumber($customer_number);
+        if (!$user->exists()) {
+            throw new \Exception('User not found for customer number: ' . $customer_number);
+        }
+        $user_id = $user->id;
         // Save the token in the database
         (new tokens_o())->create($user_id, $token, 'AUTH_TOKEN');
         return $token;