A few failing tests to take care of

I removed the invalid services I added as they weren't handled properly, I left the valid service using an array.

I was expecting the following types to be rejected but they are not at the moment: True, "", "Some type".

Since this is out of scope for this PR I will leave it as so. Perhaps it would be interesting to consider updating to pydantic 2.0.3+ in the future if there is a need for more strict field validation and introduce field_validators. Field validators would allow to make more interesting validation such as ensuring there is no space in a string, validating the length of an array, etc...

Let me know if this is satisfactory

It's possible to do the same with Pydantic 1.x but it would be nice to move to 2.0 regardless. I'm satisfied with these checks for now. Thanks for the contribution!