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).