OptionalmoduleOptionalinitializationOptionalfactoryWires module access into the factory.
⚠️ Declared here because the controller now CALLS it. It existed on
APIFactoryManager from the start and nobody ever invoked it, so the factory
ran with getModule === null for its whole life — invisible while its only
job was to fill a map of its own, fatal the moment its accessors had to reach
Core.
Opaque manager shapes: typed at the class level, stored as a union here.