Function tsrvf_from_alignment_with_method 

pub fn tsrvf_from_alignment_with_method(
    karcher: &KarcherMeanResult,
    argvals: &[f64],
    method: TransportMethod,
) -> TsrvfResult

Compute TSRVF from a pre-computed Karcher mean with configurable transport.

• TransportMethod::LogMap: Uses inv_exp_map(mu, qi) directly (standard TSRVF).
• TransportMethod::SchildsLadder: Computes v = -log_qi(mu), then transports via Schild’s ladder from qi to mu.
• TransportMethod::PoleLadder: Same but via pole ladder.