Refactor(linear): split LinearBackward kernel into 3 independent kernels#142

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split_linear_backward

Commits on Apr 27, 2026

Refactor(linear): split LinearBackward kernel into 3 independent kernels
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refactor(matmul): split MatmulBackward kernel into 2 independent kernels
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refactor(gemm): extract shared GemmCuda primitive; split matmul kernels; rename MatmulBackwardInput1/2
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Commits on Apr 28, 2026

refactor(sgemv): extract shared SgemvCuda primitive; add sgemv branches in linear kernels
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Commits on Apr 30, 2026

refactor: fix Matmul nullptr safety and convert GemmParams/SgemvParams to designated initializers
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