feat(minimax-h3): enable 2x RTX 4090/5090 with DLO (#5764)

Signed-off-by: lishunyang12 <lishunyang03@gmail.com>
Signed-off-by: lishunyang12 <lishunyang12@163.com>
Co-authored-by: lishunyang12 <lishunyang03@gmail.com>

vllm_omni/engine/arg_utils.py

@@ -495,6 +495,7 @@ class OrchestratorArgs:
     enable_layerwise_offload: bool = False
     enable_distributed_layerwise_offload: bool = False
     dlo_use_allgather: bool = True
+    dlo_resident_layers: int = 0
     boundary_ratio: float | None = None
     flow_shift: float | None = None
     diffusion_kv_cache_dtype: str | None = None