[Model] Reduce MOSS-TTS Local intermediate output overhead

Keep internal talker control outputs FINAL_ONLY while codec audio remains incremental. Reapply pipeline sampling constraints after default streaming coercion, log routine coercions at debug level, and cover explicit/default parameters with regression tests. Document matched high-concurrency statistics settings.

Signed-off-by: Sy03 <1370724210@qq.com>

vllm_omni/entrypoints/utils.py

@@ -868,9 +868,9 @@ def maybe_coerce_to_message_type(params: SamplingParams, is_streaming: bool):
     if params.output_kind == target_type:
         return params
     elif is_streaming and params.output_kind == RequestOutputKind.FINAL_ONLY:
-        logger.warning("Request appears to be streaming, but got request type final only!")
+        logger.debug("Coercing FINAL_ONLY output to DELTA for streaming")
     elif not is_streaming and params.output_kind == RequestOutputKind.DELTA:
-        logger.warning("Request appears to not be streaming, but got request type delta!")
+        logger.debug("Coercing DELTA output to FINAL_ONLY for non-streaming")
 
     if not params.skip_clone:
         params = params.clone()