CRAN resubmission polish.
DESCRIPTION formatting for CRAN: software/service names are quoted
as 'Stan' and 'Zenodo', and the data-deposit reference now uses
Bradley (2026) <doi:10.5281/zenodo.20085465>.\dontrun{} examples with executable \donttest{} or unwrapped
examples, with temporary cache directories and quiet output where examples
touch downloads or cache state.print.leafwax_posterior().message().Initial CRAN release.
assess_claim(): from analytical-noise
thresholds (Level 1) through directional hydroclimate change (Level 2,
via corroborating evidence OR the vegetation-only envelope from
compute_vegetation_envelope()), quantitative magnitude (Level 3),
and unique attribution to precipitation isotopes (Level 4).detect_change()) with
autocorrelation-adjusted thresholds and full posterior propagation
through invert_d2H(). The within-record detection threshold
decomposes the variance of the difference between two single samples
as 2 * sigma_residual^2 * (1 - rho_t) + 2 * sigma_analytical^2,
applying the lag-1 autocorrelation factor only to the residual term
(analytical measurement error is independent between samples).