chore: add debug comment to diagnose mode

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Public/AdsensePlacement/Infrastructure/Services/ContentAdInjector.php

@@ -52,11 +52,18 @@ final class ContentAdInjector
         // Determinar modo de operacion
         $mode = $this->settings['incontent_advanced']['incontent_mode'] ?? 'paragraphs_only';
 
+        // DEBUG TEMPORAL: Insertar comentario HTML para diagnosticar
+        $debugComment = sprintf(
+            '<!-- ROI_AD_DEBUG: mode=%s, hasIncontentAdvanced=%s -->',
+            $mode,
+            isset($this->settings['incontent_advanced']) ? 'YES' : 'NO'
+        );
+
         if ($mode === 'paragraphs_only') {
-            return $this->injectParagraphsOnly($content);
+            return $debugComment . $this->injectParagraphsOnly($content);
         }
 
-        return $this->injectAdvanced($content);
+        return $debugComment . $this->injectAdvanced($content);
     }
 
     /**