fix: address user input preparation in workflow app generator (#28410)

Co-authored-by: lyzno1 <92089059+lyzno1@users.noreply.github.com>

api/core/app/apps/workflow/app_generator.py

@@ -145,7 +145,8 @@ class WorkflowAppGenerator(BaseAppGenerator):
             **extract_external_trace_id_from_args(args),
         }
         workflow_run_id = str(uuid.uuid4())
-        # for trigger debug run, not prepare user inputs
+        # FIXME (Yeuoly): we need to remove the SKIP_PREPARE_USER_INPUTS_KEY from the args
+        # trigger shouldn't prepare user inputs
         if self._should_prepare_user_inputs(args):
             inputs = self._prepare_user_inputs(
                 user_inputs=inputs,