[Feature] Support prefill batch inference for pooling models.

[lizexu123]

Motivation

支持pooling模型多batch推理

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Modifications

Usage or Command

对于纯文多batch推理

export FD_ENABLE_MAX_PREFILL=1

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 1 \
    --gpu-memory-utilization 0.9 \
    --runner pooling \
    --convert embed \
    --max-num-partial-prefills 10 \
    --max-long-partial-prefills 10 \

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.
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[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 86.66667% with 2 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@438c9f7). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
fastdeploy/worker/gpu_model_runner.py	86.66%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #5436   +/-   ##
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  Coverage           ?   59.53%           
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  Files              ?      327           
  Lines              ?    40646           
  Branches           ?     6170           
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  Hits               ?    24200           
  Misses             ?    14586           
  Partials           ?     1860           

Flag	Coverage Δ
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