Function k5_ssd_chunk_scan 

pub fn k5_ssd_chunk_scan(
    da_cumsum_bhnl: Tensor<4>,
    dt_discretized_bhnl: Tensor<4>,
    x_bnlhp: Tensor<5>,
    c_bnlhr: Tensor<5>,
    cb_bnhll: Tensor<5>,
    chunk_input_state_bnhpr: Tensor<5>,
    d_h: Tensor<1>,
) -> Tensor<5>

Based on the Kernel 5 Triton reference _chunk_scan_fwd_kernel (ssd_chunk_scan.py).

Returns:

• y_bnlhp [final output]