SchemaDecl confused authoring with Catalog/ToolSpec delivery. Authors now
declare ContractDecl (nested contract.* types) on Spec/LeafSpec/Shortcut;
AttachContract registers only through cli.RegisterRuntimeContractFinal, and
description provenance stamps cobra_help when Long wins.
Co-authored-by: Cursor <cursoragent@cursor.com>
Drop the dual-entry thin alias layer so helpers/shortcut/framework author
contract.* types directly; keep only AnnotateRuntime* delivery helpers in cli
and document the corecmd→cli seam.
Co-authored-by: Cursor <cursoragent@cursor.com>