Consider deprecating old data API

**Feature request**
It would be great to have import for components.

**Use case**
Many users need this functionality for production deployments.

**Implementation idea**
Add a new config option `enable_import` with default `false`.

The issue mentions components, an old data API, and a proposed enable_import configuration option, but names no files, tests, or entry points. First clarify whether the goal is deprecation, component import, or both, then identify the relevant implementation and tests; done criteria should define the API behavior, configuration default, and migration or deprecation outcome.

Written by the indexing model from the issue text.