chore: satisfy changed-file policy

Scoped pre-commit over the 27 files this rebase touches: ruff format
reflow, the vLLM-Omni SPDX copyright line on the new modules, and wording
the typos hook rejected.

The Python 3.10 mypy hook still reports 24 errors across five of these
files. All 24 sit on pre-existing lines; none fall on a line this rebase
changed, which the repository documents as the CI-skipped condition.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_0146Xu5Sgj4vXxLxvLjV5YPj
Signed-off-by: tzhouam <tzhouam@connect.ust.hk>

tests/diffusion/diffusion_kv/test_request.py

@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
-# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
+# SPDX-FileCopyrightText: Copyright contributors to the vLLM-Omni project
 
 import pytest
 import torch
@@ -13,8 +13,8 @@ from vllm.v1.kv_cache_interface import (
 )
 from vllm.v1.request import RequestStatus
 
-from vllm_omni.diffusion.diffusion_kv.request import DiffusionKVContext, DiffusionKVRequest
 from tests.helpers.kv_layout import build_kv_cache_tensor
+from vllm_omni.diffusion.diffusion_kv.request import DiffusionKVContext, DiffusionKVRequest
 
 pytestmark = [pytest.mark.core_model, pytest.mark.cpu, pytest.mark.diffusion]