[Bugfix][MiniMax-Music3] Resolve stage subdirs against a real snapshot (#6640)

Signed-off-by: Yueqian Lin <linyueqian@outlook.com>

tools/pre_commit/check_forbidden_imports.py

@@ -194,7 +194,6 @@ CHECK_IMPORTS = {
             "vllm_omni/diffusion/models/utils.py",
             "vllm_omni/diffusion/models/wan2_2/pipeline_wan2_2.py",
             "vllm_omni/engine/arg_utils.py",
-            "vllm_omni/engine/stage_init_utils.py",
             "vllm_omni/entrypoints/openai/api_server.py",
             "vllm_omni/entrypoints/openai/serving_speech.py",
             "vllm_omni/entrypoints/openai/tts_adapters/cosyvoice3.py",