[None][feat] Refactor visual_gen's attention handling: - #17449
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- Metadata as params - Wan-like: Self attention and cross attention must use separate metadata sites - Enable (quantized) TRTLLM backend for cross attention * Separate is_cross definition in thop vs. in python: thop needs specialized is_cross treatment only if KV cache is paged or ragged, while separateQkv cross routes through regular context attention path - VisualGen attention module: * qkv_format only links to linear to_qkv's output format. Never infer self/cross attention from it. * use an is_cross flag to clearly mark self/cross attention instead. - Pipeline manages attention metadata. - Pipeline registers attention metadata as CUDA graph keys. Signed-off-by: Ruqing Xu <7891482+xrq-phys@users.noreply.github.com>
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Description
Test Coverage
Tests adjusted against new metadata use.
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PR Follows TRT-LLM CODING GUIDELINES to the best of your knowledge.
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