config: constructing a config no longer resolves it (#35907)

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

examples/runtime/token_in_token_out/token_in_token_out_vlm_engine.py

@@ -1,5 +1,4 @@
 import argparse
-import dataclasses
 from typing import Tuple
 
 from transformers import AutoProcessor
@@ -45,7 +44,7 @@ def token_in_out_example(
             model_override_args=server_args.json_model_override_args,
         ),
     )
-    backend = Engine(**dataclasses.asdict(server_args))
+    backend = Engine(server_args=server_args)
 
     output = backend.generate(
         input_ids=input_ids,
@@ -71,4 +70,5 @@ if __name__ == "__main__":
     ]
     args = parser.parse_args(args=args)
     server_args = ServerArgs.from_cli_args(args)
+    server_args.resolve_once()
     token_in_out_example(server_args)