Fix hunyuan ci (#5143)

Signed-off-by: zzh <943967662@qq.com>

vllm_omni/diffusion/worker/diffusion_worker.py

@@ -288,6 +288,12 @@ class DiffusionWorker:
         # Since vLLM v0.20.0, IR wraps GPU ops. Set IR op priority preference to enforce GPU op fusion during wrapping.
         # Also need to log, because vLLM internally logs another line in VllmConfig.__post_init__. Avoid confusion.
         vllm_config.kernel_config.ir_op_priority = _resolve_ir_op_priority(self.od_config, vllm_config)
+        if self.od_config.moe_backend != "auto":
+            logger.warning(
+                "Overriding MoE backend from default 'auto' to '%s' per deploy config.",
+                self.od_config.moe_backend,
+            )
+            vllm_config.kernel_config.moe_backend = self.od_config.moe_backend
         logger.info(
             "Final IR op priority after setting vLLM-Omni overrides: %s", vllm_config.kernel_config.ir_op_priority
         )