Pure helpers for extend_to_all tolerance derivation.
Extracted from scene-loader.ts so the validation rules and the
cached "extend tolerance to infinity for these dim names" math can
be unit-tested without instantiating SceneLoader (which needs zarr,
ViewStateManager, LoaderRegistry, ...).
Pure helpers for extend_to_all tolerance derivation.
Extracted from scene-loader.ts so the validation rules and the cached "extend tolerance to infinity for these dim names" math can be unit-tested without instantiating SceneLoader (which needs zarr, ViewStateManager, LoaderRegistry, ...).