[Bug fix] Fix the multi-input accuracy issue in the pooling model.

[lizexu123]

Motivation

修复pooling模型多输入精度问题

💡 If this PR is a Cherry Pick, the PR title needs to follow the format by adding the [Cherry-Pick] label at the very beginning and appending the original PR ID at the end. For example, [Cherry-Pick][CI] Add check trigger and logic(#5191)

💡 如若此PR是Cherry Pick，PR标题需遵循格式，在最开始加上[Cherry-Pick]标签，以及最后面加上原PR ID，例如[Cherry-Pick][CI] Add check trigger and logic(#5191)

Modifications

对于纯文多batch推理

model_path=Qwen3-Embedding-0.6B
python -m fastdeploy.entrypoints.openai.api_server \
    --model ${model_path} \
    --max-num-seqs 256 \
    --max-model-len 32768 \
    --port 8070 \
    --engine-worker-queue-port 7562 \
    --metrics-port 7531 \
    --tensor-parallel-size 2 \
    --gpu-memory-utilization 0.9 \
    --runner pooling \
    --convert embed 

Usage or Command

Accuracy Tests

Checklist

• Add at least a tag in the PR title.
  • Tag list: [[FDConfig],[APIServer],[Engine], [Scheduler], [PD Disaggregation], [Executor], [Graph Optimization], [Speculative Decoding], [RL], [Models], [Quantization], [Loader], [OP], [KVCache], [DataProcessor], [BugFix], [Docs], [CI], [Optimization], [Feature], [Benchmark], [Others], [XPU], [HPU], [GCU], [DCU], [Iluvatar], [Metax]]
  • You can add new tags based on the PR content, but the semantics must be clear.
• Format your code, run pre-commit before commit.
• Add unit tests. Please write the reason in this PR if no unit tests.
• Provide accuracy results.
• If the current PR is submitting to the release branch, make sure the PR has been submitted to the develop branch, then cherry-pick it to the release branch with the [Cherry-Pick] PR tag.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
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Additional details and impacted files

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[paddle-bot]

Thanks for your contribution!