[Bugfix] fix mindiesd laserattention unsupported error

[fan2956]

PLEASE FILL IN THE PR DESCRIPTION HERE ENSURING ALL CHECKLIST ITEMS (AT THE BOTTOM) HAVE BEEN CONSIDERED.

Purpose

This PR fixes a RuntimeError encountered when calling the mindie custom op LaserAttention in diffusion models. The error occurred with the following message:
RuntimeError: call aclnnLaserAttention failed, detail:[PID: 1114958] 2026-04-10-10:18:07.438.311 AclNN_Parameter_Error(EZ1001): Get regInfo failed, The binary_info_config.json of socVersion [ascend910b] does not support opType [LaserAttention].
The root cause was that the ASCEND_CUSTOM_OPP_PATH environment variable was not properly configured before attempting to use the custom op. This PR ensures mindiesd is imported before the model's forward pass, which configures ASCEND_CUSTOM_OPP_PATH and allows LaserAttention to be called correctly.

Test Plan

export MINDIE_SD_FA_TYPE=ascend_laser_attention
vllm serve wan2.2-i2v-diffusers
--omni
--port 8099
--usp 8
--use-hsdp
--vae-patch-parallel-size 8
--vae-use-tiling
--log-stats
--profiler-config '{"profiler": "torch", "torch_profiler_dir": "./vllm_profile"}'

curl -X POST http://localhost:8099/v1/videos \
    -F "prompt='一只棕色野兔的正面特写镜头，采用低角度仰拍视角，营造亲密而庄严的视觉冲击。兔子一双圆润漆黑的大眼睛直视镜头深处，眼神中交织着野生动物的警觉与一丝难以言喻的温柔好奇，仿佛在与观者建立跨越物种的静默对话。它毛色呈现层次丰富的棕褐渐变，从浅奶油色腹部过渡到深棕背部，每根毛发纹理清晰可辨，在侧光下泛着丝绸般的光泽。细长洁白的胡须共有三对，随呼吸节奏微微颤动，偶尔因捕捉气流信息而轻轻摇摆。
两只标志性的长耳完全竖立，耳廓外侧覆盖短密棕毛，内侧则露出粉嫩的血管网络，薄如蝉翼的皮肤下血液流动隐约可见，耳朵以细微幅度不时转动，精准定位声源方向。背景是一片澄澈的蔚蓝天空，形态蓬松的白色积云以缓慢速度横向漂移，云影在兔子头顶交替变化，光线随之明暗流转。晴朗天气的明媚阳光从画面左上方45度角倾泻而下，在兔脸右侧形成柔和的伦勃朗式阴影，强化了面部立体感和皮毛质感。
兔子湿润的黑鼻子持续进行每秒三至四次的快速抽动，这是它们感知化学信号的本能动作，粉色三瓣嘴随之轻启，露出正在反刍的洁白门齿，下颌以稳定节奏左右研磨。摄影采用大光圈浅景深，焦点牢牢锁定在兔子双眼连线所在的焦平面，背景天空和远景绿色植被虚化成圆润的彩色光斑，前景几根嫩绿草叶闯入画面边缘，以缓慢弧线随风摇曳，暗示着和煦的春日微风。
整个场景弥漫着宁静致远的田园诗意，色彩温暖饱和，充满生命力。兔子在持续五秒的对视后，以典型 lagomorph 特征完成一次完整的瞬膜眨眼——第三眼睑从内侧横向滑过眼球，继而缓缓歪头向右十五度，这个行为在动物行为学中代表认知加工和好奇心表达，耳朵随之向同一方向倾斜，最终恢复正视姿态，胡须舒展，完成这段短暂而珍贵的自然纪录。'" \
    -F "input_reference=@/home/zf/vllm-omni/rabbit.jpeg" \
    -F "size=1280x720" \
    -F "seconds=5" \
    -F "fps=24" \
    -F "num_frames=121" \
    -F "guidance_scale=1" \
    -F "guidance_scale_2=1" \
    -F "flow_shift=5.0" \
    -F "num_inference_steps=4" \
    -F "seed=42"

Test Result

dit infer time
origin: 44s
Laserattention: 30s

---

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[hsliuustc0106]

No regression test for this bugfix. Please add a test that verifies mindiesd import happens before the custom op is used, or at minimum a unit test for get_diffusion_attn_backend_cls that checks the import side effect.

Also: this appears to be a duplicate of #2673. Please close one.

[hsliuustc0106]

No regression test for this bugfix. Please add a test that verifies mindiesd import happens before the custom op is used, or at minimum a unit test for get_diffusion_attn_backend_cls that checks the import side effect.

Also: this appears to be a duplicate of #2673. Please close one.

let wait until npu ci is on