lower-to-canonical.ts: clauseEquivalent now compares compoundOperator
and compoundGroupId. Previously, compound assertions with different
operators (.and vs .or) were considered equivalent.
fol-compiler.ts: adaptGrammarFormulaToLogicAst validates node.kind
against known formula kinds (forall/exists/and/or/not/implies/predicate)
before passing through as FormulaNode. Previously any object with a
'kind' property was blindly cast.
predicates.ts / registry.ts: @deprecated tags on globalPredicateRegistry
and globalClauseRegistry. Both are still functional but consumers should
transition to explicit injection via LogicEngineOptions / EvaluationOptions.
454 solver+DSL tests pass, zero regressions.
John Dvorak