fix: Properly update gateway enabled property + add debug logging

🔍 Suspect #7: Gateway enabled property not being updated

Problem:
- We save to database ✅
- We reload settings ✅
- But $gateway->enabled property might not update!

Root Cause:
WooCommerce has TWO places for enabled status:
1. $gateway->settings['enabled'] (in database)
2. $gateway->enabled (instance property)

We were only updating #1, not #2!

The Fix:
// Update both places
$gateway->settings = $new_settings;  // Database
update_option($gateway->get_option_key(), $gateway->settings);

if (isset($new_settings['enabled'])) {
    $gateway->enabled = $new_settings['enabled'];  // Instance property!
}

Added Debug Logging:
- Log toggle request (gateway ID + enabled value)
- Log save process (current vs new enabled)
- Log update_option result
- Log final enabled value after fetch
- All logs prefixed with [WooNooW] for easy filtering

How to Debug:
1. Toggle a gateway
2. Check debug.log or error_log
3. Look for [WooNooW] lines
4. See exact values at each step

Files Modified:
- PaymentGatewaysProvider.php: Update both settings + enabled property
- PaymentsController.php: Add debug logging

Next Step:
Test toggle and check logs to see what's actually happening!

includes/Api/PaymentsController.php

@@ -220,9 +220,13 @@ class PaymentsController extends WP_REST_Controller {
         }
         
         try {
+            // Debug: Log what we're trying to do
+            error_log(sprintf('[WooNooW] Toggling gateway %s to %s', $gateway_id, $enabled ? 'enabled' : 'disabled'));
+            
             $result = PaymentGatewaysProvider::toggle_gateway($gateway_id, $enabled);
             
             if (is_wp_error($result)) {
+                error_log(sprintf('[WooNooW] Toggle failed: %s', $result->get_error_message()));
                 return $result;
             }
             
@@ -232,12 +236,16 @@ class PaymentsController extends WP_REST_Controller {
             // Return updated gateway data (fresh from DB)
             $gateway = PaymentGatewaysProvider::get_gateway($gateway_id);
             
+            // Debug: Log what we got back
+            error_log(sprintf('[WooNooW] Gateway %s after toggle: enabled=%s', $gateway_id, $gateway['enabled'] ? 'true' : 'false'));
+            
             return rest_ensure_response([
                 'success' => true,
                 'message' => $enabled ? 'Gateway enabled' : 'Gateway disabled',
                 'gateway' => $gateway,
             ]);
         } catch (\Exception $e) {
+            error_log(sprintf('[WooNooW] Toggle exception: %s', $e->getMessage()));
             return new WP_Error(
                 'toggle_gateway_failed',
                 $e->getMessage(),