feat: Pin versions of tools in tools endpoint

[oSumAtrIX]

Issue

Currently, the API always supplies the latest versions of the backend that provides them. This constrains us at having to change the versions of the tools we want to supply at the backend instead of the API.

Motivation

This would allow any backend to make releases without having to worry about what they supply via the API as the API would be in control of what version is being released. Additionally, when having to revert releases, this would come in handy.

Additional context

This feature may conflict with the design of the API. The API transforms the backend but does not change any data. If the backend supplies version X so may the API.