Registry mapping each editor type to the component (or native sentinel)
that renders an expression's value. The single override surface for value
editors - swap one or more by providing a new map:
Provide at environment, route, or component level. The default factory
builds a fresh map covering the four builtin entries (string / number /
date / boolean -> native sentinels).
Orthogonal to the config cascade: provideFilterBuilderConfig does NOT
touch editor resolution - editors live on this token alone.