Improve middleware performance

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

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

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

Start by locating the middleware configuration and the code that handles hook imports; the issue does not name a file or test. Confirm how configuration defaults are defined, then add the `enable_import` option with a default of `false` and verify that enabling it imports hooks for production deployments.

Written by the indexing model from the issue text.