debug: Add debug markers to verify ProductsController is running

Added debug markers:
1. _debug field in response with timestamp
2. X-WooNooW-Version header
3. Improved variation attribute retrieval

Issue: API returns different structure than code produces
Response has: id, name, price (only 9 fields)
Code returns: id, name, type, status, price, etc (15+ fields)

This suggests:
- Response is cached somewhere
- Different controller handling request
- Middleware transforming response

Debug steps:
1. Check response for _debug field
2. Check response headers for X-WooNooW-Version
3. If missing, endpoint not using our code
4. Check wp-content/debug.log for error messages

includes/Api/ProductsController.php

@@ -167,12 +167,14 @@ class ProductsController {
 			'page' => $page,
 			'per_page' => $per_page,
 			'pages' => $query->max_num_pages,
+			'_debug' => 'ProductsController-v2-' . time(), // Verify this code is running
 		], 200);
 		
 		// Prevent caching
 		$response->header('Cache-Control', 'no-cache, no-store, must-revalidate');
 		$response->header('Pragma', 'no-cache');
 		$response->header('Expires', '0');
+		$response->header('X-WooNooW-Version', '2.0'); // Debug header
 		
 		return $response;
 	}
@@ -579,29 +581,35 @@ class ProductsController {
 				
 				// Format attributes with human-readable names and values
 				$formatted_attributes = [];
-				$variation_attributes = $variation->get_attributes();
 				
-				// Debug: Log raw variation attributes
+				// Get parent product attributes to know what to look for
-				error_log('WooNooW Debug - Variation #' . $variation_id . ' raw attributes: ' . print_r($variation_attributes, true));
+				$parent_attributes = $product->get_attributes();
 				
-				foreach ($variation_attributes as $attr_name => $attr_value) {
+				foreach ($parent_attributes as $parent_attr) {
-					// Handle taxonomy attributes (pa_*)
+					if (!$parent_attr->get_variation()) {
-					if (strpos($attr_name, 'pa_') === 0) {
+						continue; // Skip non-variation attributes
-						// Global attribute
-						$taxonomy = $attr_name;
-						$clean_name = wc_attribute_label($taxonomy);
-						
-						if (!empty($attr_value)) {
-							$term = get_term_by('slug', $attr_value, $taxonomy);
-							$attr_value = $term ? $term->name : $attr_value;
-						}
-					} else {
-						// Custom attribute
-						$clean_name = ucfirst(str_replace('_', ' ', $attr_name));
-						// For custom attributes, the value is already the display value
 					}
 					
-					$formatted_attributes[$clean_name] = $attr_value;
+					$attr_name = $parent_attr->get_name();
+					$clean_name = $parent_attr->get_name(); // Already clean for custom attributes
+					
+					// Get the variation's value for this attribute
+					if (strpos($attr_name, 'pa_') === 0) {
+						// Global/taxonomy attribute
+						$clean_name = wc_attribute_label($attr_name);
+						$value = $variation->get_attribute($attr_name);
+						
+						// Convert slug to term name
+						if (!empty($value)) {
+							$term = get_term_by('slug', $value, $attr_name);
+							$value = $term ? $term->name : $value;
+						}
+					} else {
+						// Custom attribute - get from meta
+						$value = get_post_meta($variation_id, 'attribute_' . sanitize_title($attr_name), true);
+					}
+					
+					$formatted_attributes[$clean_name] = $value;
 				}
 				
 				$variations[] = [