[Feat] support quantization for GLM-IMAGE (#2292)

Signed-off-by: Lancer <maruixiang6688@gmail.com>
Signed-off-by: Hongsheng Liu <liuhongsheng4@huawei.com>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

vllm_omni/engine/async_omni_engine.py

@@ -1450,7 +1450,10 @@ class AsyncOmniEngine:
                 if lora_scale is not None:
                     if not hasattr(cfg.engine_args, "lora_scale") or cfg.engine_args.lora_scale is None:
                         cfg.engine_args.lora_scale = lora_scale
+                # Prefer explicit quantization_config; fallback to legacy --quantization.
                 quantization_config = kwargs.get("quantization_config")
+                if quantization_config is None:
+                    quantization_config = kwargs.get("quantization")
                 if quantization_config is not None:
                     if (
                         not hasattr(cfg.engine_args, "quantization_config")