[LingBot World] Eleven bit-identical removals of repeated work in the realtime path (#7648)

Signed-off-by: tzhouam <tzhouam@connect.ust.hk>
Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>

vllm_omni/diffusion/models/interface.py

@@ -92,6 +92,13 @@ class SupportsStepExecution(Protocol):
     ``prepare_encode()`` (one-time request setup), ``denoise_step()``
     (one denoise forward), ``step_scheduler()`` (one scheduler update),
     and ``post_decode()`` (final decode).
+
+    A pipeline may additionally set the optional class attribute
+    ``supports_chunk_step_grouping = True`` to declare that its request state
+    may advance through every denoise step of its current chunk without a
+    serving-scheduler cycle in between (a capability, not a policy: the runner
+    that owns the scheduling decision chooses whether to group steps). It is
+    optional so it does not become part of the runtime protocol check.
     """
 
     supports_step_execution: ClassVar[bool] = True