0.32.0

Every engine within its budget, a search that says what is not there,
conditioned coverings, roles moved on one graph, and the best candidate.
Two new commands (61): covering and roles; three new kinds (64):
conditioned_cover, role_transport, synth_optimum. The schema stays 5;
new optional fields: profiles (affine_semigroup), cleared
(polynomial_nonneg), pending, needs, not_closed (proof).

Fixed

• Seventeen engines ignored the time budget (semigroup, number,
  shrink, parametric among them): each now runs under its timeout_ms
  and the run's deadline, stops inside its loops, and a test runs every one
  past its deadline. semigroup keeps what it decided.
• A semigroup's status read as one answer for many questions: each point
  now says member, not_member or undecided, and the scope says these are
  COUNTS, not physical objects.

New

• certo covering (CoveringSpec): a box, conditions and alternative
  obligations; the leaves, each with its reason, tile the box, boundaries
  included (conditioned_cover, solver-free). Unresolved leaves are listed; a
  point where everything fails is a counterexample.
• certo roles (RoleSpec): roles exchanged on one graph without
  changing it -- the automorphism, and each declared property before and after
  (role_transport, solver-free).
• The best candidate: SynthSpec(minimize=...) / maximize, certified by
  the candidate and the refuted search for a better one (synth_optimum).
  correctness as {name: formula} names which obligation each
  counterexample breaks.
• Prerequisite chains in compose: ProofSpec.pending(...) and
  lemma(..., needs=[...]); a theorem resting on a pending prerequisite is
  NOT CLOSED, said as the verdict.
• Semigroup profiles: the least value of a free coordinate with the point
  in S, every smaller value excluded.
• NonnegSpec(clear_denominators=True): the sign of the denominator
  proved on the box, and the numerator certified with that orientation.
• Why a question did not settle: a timeout or unknown from prove or
  check reads the theory, floors, products and the hypotheses that bring
  them, and says what to try (meta["hardness"]).
• find answers with a verdict -- found, not_available (why, and what
  instead) or not_in_certo -- each result with its confidence, what it does
  not establish, an example and the call for the CLI, MCP and the API;
  find --spec FILE says what can be done with a spec. Spec methods indexed.
• verify --obligation covers atlas and covering certificates, and a
  nonneg with cleared denominators.