tulpaObs 0.0.231

• The sbc() registry's end-to-end composition test slices the pooled
  response at whatever rank the family brings. Its slice_site() helper
  enumerated ranks -- 3D array, else 2D matrix -- so ms_dyn_occu(), whose
  y is 4D [site x visit x season x species], fell to the 2D branch and
  errored with "incorrect number of dimensions". .tobs_sbc_pool_4d_species()
  was right: every registered family pools on the first axis and leaves the
  rest alone, so the helper now indexes axis 1 at any rank and the
  rank-enumeration cannot go stale again the next time a family arrives with
  a new response shape.

• man/dot-tobs_community_em.Rd regenerated, clearing an R CMD check
  codoc WARNING. .tobs_community_em() gained re_aghq/n_quad/
  re_aghq_maxdim (with their roxygen) when the AGHQ variance debias was
  generalized onto it, but document() was not re-run, so the Rd's \usage
  had been three arguments behind the function since then.

---

Tagged before CI ran green. The run on this commit cleared the codoc WARNING
and the rank error, and reported one remaining failure: ms_abun() was
registered without its .sbc_reg_means() branch, so the sbc() registry
test read its community mean where the registry ranks the per-species
realized coefficient. That is fixed in v0.0.232, the first version in this
sequence with smoke (4936 assertions, 0 failures, 0 errors) and
R CMD check (Status: OK) both passing.