[Bugfix] Enable V1 usage stats (#16986)

Signed-off-by: mgoin <mgoin64@gmail.com>
Signed-off-by: Nick Hill <nhill@redhat.com>
Co-authored-by: Nick Hill <nhill@redhat.com>

vllm/v1/engine/async_llm.py

@@ -36,6 +36,7 @@ from vllm.v1.executor.abstract import Executor
 from vllm.v1.metrics.loggers import (LoggingStatLogger, PrometheusStatLogger,
                                      StatLoggerBase)
 from vllm.v1.metrics.stats import IterationStats, SchedulerStats
+from vllm.v1.utils import report_usage_stats
 
 logger = init_logger(__name__)
 
@@ -114,6 +115,9 @@ class AsyncLLM(EngineClient):
         except RuntimeError:
             pass
 
+        # If usage stat is enabled, collect relevant info.
+        report_usage_stats(vllm_config, usage_context)
+
     @classmethod
     def from_vllm_config(
         cls,