Super tiny fix missing input throughput (#11607)

python/sglang/srt/managers/scheduler_metrics_mixin.py

@@ -135,6 +135,7 @@ class SchedulerMetricsMixin:
         if self.disaggregation_mode == DisaggregationMode.PREFILL:
             f += f"#prealloc-req: {len(self.disagg_prefill_bootstrap_queue.queue)}, "
             f += f"#inflight-req: {len(self.disagg_prefill_inflight_queue)}, "
+            f += f"input throughput (token/s): {self.last_input_throughput:.2f}, "
 
         logger.info(f)