Function write_to_slice_from_v1 

pub fn write_to_slice_from_v1<T: TraceData>(
    slice: &mut &mut [u8],
    payload: &TracerPayload<T>,
) -> Result<(), ValueWriteError>

Encodes a TracerPayload as v0.4 msgpack into the provided slice. Useful for callers that own a pre-sized buffer (e.g. for FFI / zero-copy paths).

Errors

Returns any ValueWriteError from the underlying writer (typically buffer-too-small).