rebuild_mode: use logging.exception for failed task wrap

src/otaclient/create_standby/rebuild_mode.py

@@ -55,7 +55,7 @@ def _wrapped(entry: FileTableBase):
         try:
             return _func(entry)
         except Exception as e:
-            burst_suppressed_logger.warning(f"failed to process {entry}: {e!r}")
+            burst_suppressed_logger.exception(f"failed to process {entry}: {e!r}")
 
     return _wrapped