feat: fetch and log detailed Instagram container processing errors

social_media_publishers/instagram/publisher.py

@@ -221,22 +221,24 @@ class InstagramPublisher(SocialPublisher):
         """Poll container status until ready or failed."""
         endpoint = f"{self.api_base}/{container_id}"
         logger.info("⏳ Waiting for processing...")
-        
+
         for attempt in range(1, max_attempts + 1):
-            params = {'access_token': self.access_token, 'fields': 'status_code'}
+            params = {'access_token': self.access_token, 'fields': 'status_code,status'}
             response = self._get_session().get(endpoint, params=params)
             result = response.json()
-            
+
             status = result.get('status_code')
             logger.debug(f"  Attempt {attempt}/{max_attempts}: {status}")
-            
+
             if status == 'FINISHED':
                 return status
             elif status == 'ERROR':
+                error_detail = result.get('status', '')
+                logger.error(f"❌ Instagram processing error: {error_detail}")
                 return status
-            
+
             time.sleep(10)
-        
+
         return 'TIMEOUT'
 
     def _publish_container(self, container_id: str) -> Dict[str, Any]: