Function diagnose_alignment 

pub fn diagnose_alignment(
    data: &FdMatrix,
    karcher: &KarcherMeanResult,
    argvals: &[f64],
    config: &DiagnosticConfig,
) -> Result<AlignmentDiagnosticSummary, FdarError>

Diagnose alignment quality for every curve after a Karcher mean computation.

For each curve the function computes warp complexity, smoothness, pre- and post-alignment residuals, and checks for non-monotone warps and insufficient improvement. Curves with any issue are flagged.

Arguments

• data — Original (unaligned) functional data (n x m).
• karcher — Result of super::karcher::karcher_mean.
• argvals — Evaluation grid (length m).
• config — Diagnostic thresholds.

Errors

Returns FdarError::InvalidDimension on shape mismatches.