fix(sglang): add enable_trace to diffusion worker ServerArgs stub (#8332)

Signed-off-by: Krishnan Prashanth <kprashanth@nvidia.com>

components/src/dynamo/sglang/args.py

@@ -360,6 +360,7 @@ async def parse_args(args: list[str]) -> Config:
         server_args.disaggregation_mode = None
         server_args.dllm_algorithm = False
         server_args.load_format = None
+        server_args.enable_trace = getattr(parsed_args, "enable_trace", False)
         logging.info(
             f"Created stub ServerArgs for {worker_type}: model_path={server_args.model_path}"
         )

components/src/dynamo/sglang/request_handlers/handler_base.py

@@ -144,7 +144,7 @@ class BaseGenerativeHandler(ABC, Generic[RequestT, ResponseT]):
             publisher: Optional metrics publisher for the worker.
         """
         self.config = config
-        self.enable_trace = config.server_args.enable_trace
+        self.enable_trace = getattr(config.server_args, "enable_trace", False)
 
         # Set up metrics and KV publishers
         self.metrics_publisher: Optional[WorkerMetricsPublisher] = None
@@ -699,7 +699,7 @@ class BaseWorkerHandler(LoraMixin, RLMixin, BaseGenerativeHandler[RequestT, Resp
             self.kv_publisher = publisher.kv_publisher
         self.serving_mode = config.serving_mode
         self.use_sglang_tokenizer = config.dynamo_args.use_sglang_tokenizer
-        self.enable_trace = config.server_args.enable_trace
+        self.enable_trace = getattr(config.server_args, "enable_trace", False)
 
         if engine is not None:
             self.input_param_manager = InputParamManager(