Support import configuration

**Description**
Currently routes lacks proper serialization support.

**Proposed solution**
Add configurable serialization with sensible defaults.

**Priority**: Low/Medium

No files, tests, or entry points are named. Start by locating the routes handling and existing configuration or serialization code, then clarify the supported import configuration and sensible defaults with the maintainers; done means configurable route serialization is implemented and its behavior is covered by tests.

Written by the indexing model from the issue text.