[Bugfix] Wire log_stats to AsyncOmni and add missing token metrics for non-text requests (#4482)

Signed-off-by: blonde <164845202+blondeCS@users.noreply.github.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vllm_omni/entrypoints/openai/api_server.py

@@ -646,6 +646,7 @@ async def build_async_omni_from_stage_config(
     try:
         kwargs = args.get_explicit_kwargs_dict()
         model = kwargs.pop("model", None) or args.model
+        kwargs.setdefault("log_stats", not args.disable_log_stats)
         async_omni = AsyncOmni(model=model, **kwargs)
 
         # # Don't keep the dummy data in memory