Collapse the localfindnode tnode read to the stamped n.type_ — a
zero-delta mechanic validation for the F7 predicate type-keying arc:
self-compile byte-id holds on all four bootstrap combineds, proving
n.type_ matches the local-table truth on every corpus local before
any behavior-changing conversion lands. The localfindnode gate stays
so a global-not-def ident still routes false.