Third probe-core adapter on the UI element/state axis, mirroring edge-probe.
Closed 8-id shape-rooted UI_TAXONOMY + element-cue relevance filter
(UI_CUES -> classifyElement -> applicableCategories); unclassified fail-loud
soft-signal (#1110); fail-closed on invalid authored element kinds. All
lifecycle/merge/validation delegated to probe-core verbatim (no fork). Item
question carried in the shared Item.probe field. LIFT-01 proven at the
probe-core primitive level (projectTruths/dispositionForUnverifiableTruth):
backstop considerations route to insufficient_spec, never a silent pass.
Tests assert typed returns off the built .cjs (no source-grep).
