Jarek Radosz ba9ead855e
DEV: Fix autoloading (#322)
A follow-up to e23c31195b097223f030800614b55d09bf54d086

Fixes errors like:
```
NameError:
       uninitialized constant DiscourseDataExplorer::ValidationError
     # ./plugins/discourse-data-explorer/spec/lib/parameter_spec.rb:15:in `block (3 levels) in <main>'
```
2024-08-28 10:11:08 +02:00
..