[Edge][WP8] Time the steady-state talker-MTP graph call (model.mtp_graph_ms)

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L1ax5wYLA6XbqEL1i8L9gZ

vllm_omni/worker/gpu_model_runner.py

@@ -1957,8 +1957,13 @@ class OmniGPUModelRunner(GPUModelRunner):
             talker_kwargs["req_infos"] = [
                 self.model_intermediate_buffer.setdefault(req_id, {}) for req_id in decode_req_ids
             ]
-        with current_omni_platform.set_forward_context(
-            None, self.vllm_config, cudagraph_runtime_mode=_cudagraph_mode, batch_descriptor=batch_desc
+        from vllm_omni.edge.step_stats import StepStats
+
+        with (
+            current_omni_platform.set_forward_context(
+                None, self.vllm_config, cudagraph_runtime_mode=_cudagraph_mode, batch_descriptor=batch_desc
+            ),
+            StepStats.get().timed("model.mtp_graph_ms", sync_device=getattr(self, "device", None)),
         ):
             req_embeds, code_predictor_codes = self.talker_mtp(
                 req_input_ids,