Function rolling_sum_bool_to 

pub fn rolling_sum_bool_to(
    data: &[i32],
    mask: Option<&Bitmask>,
    subwindow: usize,
    out: &mut [i32],
    out_mask: &mut Bitmask,
)

Zero-allocation variant that writes directly to caller-provided output buffers.

Computes rolling sums over i32 data (pre-converted from booleans). Panics if out.len() != data.len().