Calling `/api/classes/{name}` with a class name with an extension causes the server to return response code 400

[simplepad]

Steps to reproduce:

1. Open Swagger UI
2. Scroll to "GET /api/classes/{name}
3. Click "Try it out"
4. Set name to win/registry_value_activity
5. Click "Execute"
6. Observe the undocumented response code 400 with no error information

Tested on https://schema.ocsf.io/ with schema version v1.8.0 and on our own self-hosted instance with schema version v1.7.0