tulpaObs 0.0.232

• The sbc() registry test reads ms_abun()'s ranked quantity, not its
  community mean. .sbc_reg_means() carries one branch per community
  family because a community fit's fit$means is the community MEAN alone
  (P-length) while its SBC design ranks the per-species REALIZED coefficient
  mu + b_s (S x P, species-major). ms_abun() was registered without its
  branch, so it fell through to the fit$means short-circuit and returned a
  2-length vector against the registry's 40 -- the exact failure the comment
  above that helper describes. Branch added, mirroring ms_distance()'s:
  as.vector(t(cbind(coef_lambda, coef_p))) against
  .tobs_sbc_ms_abun_names()$cols. All eight community families now have one.