tulpaObs 0.0.230

• ms_abun() registered for sbc() (#220, the 27th and
  final family of the original registration scope). Needed TWO upstream
  tulpa engine changes before it could even be attempted:

  1. tulpa#398 (blup_cross): exposes tulpa_re_aghq()'s per-group
     mode/theta cross-Hessian.
  2. A second gap found while wiring this family: tulpa_re_aghq() also
     only ever exposed the per-RE-TERM DIAGONAL of a group's posterior
     covariance (blup_var). ms_abun()'s lambda (abundance) and p
     (detection) arms share a per-species grouping factor with real
     cross-arm posterior covariance -- the same lambda/p identifiability
     ridge tobs()'s penalized-EM exists to break for occupancy psi/p --
     so drawing a species' abundance and detection deviations
     independently would repeat the #226 bug one level deeper (inside a
     species instead of between the community mean and a species). Fixed
     upstream by adding blup_cov_g/blup_cross_g (the full per-group
     joint covariance/cross-Hessian, unsliced by RE term), validated
     against a closed-form joint-Hessian construction on a toy model with
     deliberately collinear RE terms.

  ms_community$Cinv/Bf now thread off blup_cov_g/blup_cross_g
  (R/ms_abun.R), matching the convention every other sbc()-registered
  community family uses. Only reachable via the AGHQ/joint_fd engine
  (control = list(optimizer = "joint_fd", n.quad > 1)) -- the default
  n.quad = 1 Laplace-EM path (a different, faster engine entirely) does
  not expose Cinv/Bf at all, and errors with a pointer rather than
  silently drawing an independent (mu, b_s).

  Registered at reduced n.sim = 15 (distsamp_open's own precedent for the
  identical cost problem, see 0.0.227 below): a n.sim = 100 run at
  standard settings was projected to take >12h; the actual n.sim = 15 run
  completed in 39.9 min. Posterior calibrates cleanly (min p_unif 3.9e-3,
  0/40 quantities below 1e-3); narrow control's minimum p_unif is 2.9e-12
  (comfortably below the 1e-3 pass bar every sibling family uses), though
  one narrow-arm quantity did not fail as comprehensively as siblings'
  (max p_unif 1.3e-2 there, vs ~1e-6 to 1e-15 elsewhere) -- not
  re-investigated given the ~40min cost of a re-run, and does not weaken
  the primary (posterior) calibration signal.

  All 27 originally-scoped families are now registered for sbc().

• Engine pin raised to tulpa 0.0.198 (Imports floor and Remotes tag
  together, as .github/scripts/check-engine-pin.R requires). That release
  carries both engine changes the ms_abun() registration above depends on:
  blup_cross (gcol33/tulpa#398) and the full per-group joint covariance
  blup_cov_g/blup_cross_g. The floor and the tag had also drifted apart
  from each other (0.0.197 vs v0.0.196), which the pin check fails on.

---

Tagged before CI ran green. Every workflow run from 2026-08-11 to 2026-08-15
stopped at pak dependency resolution, so the test suite had not executed
against this code. Three defects were sitting behind that, all of them
test-side or in generated documentation: the sbc() registry test's
rank-enumerating slice helper, that test's missing ms_abun()
.sbc_reg_means() branch, and a stale man/dot-tobs_community_em.Rd.
Package behaviour is unaffected.

Use 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.