fix(state): setdefault properly trigger change on ready

Author: jourdain

src/trame_server/state.py

@@ -296,6 +296,8 @@ def setdefault(self, key, value):
         key = self._translator.translate_key(key)
         if key in self._pushed_state:
             return self._pushed_state[key]
+
+        self._suppress_change_stack.on_pending_key_added(key)
         return self._pending_update.setdefault(key, value)
 
     def is_dirty(self, *_args):