Function record 

pub fn record(
    module: &str,
    func: &str,
    loaded: bool,
    site: &'static Location<'static>,
)

2026-09-26: Record one kernel lookup; the CUDA backend’s GpuBackend::kernel calls it.

site is passed in, not taken with #[track_caller] here, because this function’s caller is the backend, not the call site that asked.