pub const VIRTUAL_LABEL_ID_START: u16 = 0xFF00;Expand description
First virtual (catalog-resolved) label ID. Label IDs in
VIRTUAL_LABEL_ID_START..VIRTUAL_LABEL_ID_SENTINEL are owned by
plugin-registered CatalogProviders and allocated lazily by the
planner via PluginRegistry::register_virtual_label. Native label
allocation (SchemaManager::add_label) refuses IDs in this range.