Add DeepSeekV3DummyPastKeyValuesGenerator #2344
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I'm working on adding DeepSeek-V3 ONNX export support.
The model has a special attention architecture where keys and values use different head dimensions - keys combine RoPE and NoPE dimensions
(qk_rope_head_dim + qk_nope_head_dim)while values use a separatev_head_dim. This differs from standard transformers where keys and values share generally the same head dimensions.The
DeepSeekV3DummyPastKeyValuesGeneratorcreates properly shaped dummy tensors for ONNX export.