Function gdn_verify_fused_conv_kn_f32 

pub fn gdn_verify_fused_conv_kn_f32(
    gpu: &dyn GpuBackend,
    kernel: KernelHandle,
    conv_state: DevicePtr,
    new_input: DevicePtr,
    weight: &DenseWeight,
    output: DevicePtr,
    conv_state_inter: DevicePtr,
    num_tokens: u32,
    dim: u32,
    d_conv: u32,
    qk_channels: u32,
    head_dim: u32,
    input_stride: u32,
    output_stride: u32,
    inter_stride: u32,
    l2_eps: f32,
    stream: u64,
) -> Result<()>

2026-09-25: FP32-output twin of super::gdn_verify_fused_conv_kn: one launch runs conv1d + SiLU + L2 norm for all K verify positions, writes FP32 conv rows, and writes each per-token conv-state snapshot inline. output_stride is in FP32 elements.