feat: ip-based verification

[86667]

This PR contains a simply /ip_verification endpoint which creates users with ip-based rate limiting.

refactor

Alongside the added endpoint we also implement 2 refactors:

• Use toml config for clear separation of services. If a service's config exists, it will be created. If not, it wont be created.
• Improve IP extractor to correctly fallback to socket address and added config var to specify accepting of x-forwarded-for. (Suggested here)

[SeverinAlexB]

Not bad. Here are some findings:

Clean Code

I strongly recommend running my two clean-code/clean-refactor skills to find issues with the code structure on each PR:

• https://gist.github.com/SeverinAlexB/d717b26b28485f90e22c5b243e4065f4
• https://gist.github.com/SeverinAlexB/60b08a96701bd14b8bbc4282e8f76466

Prompt:

I need to do a code review of this PR. Use /clean-code and /clean-refactor to review the code accordingly

This gives me the following report:
https://gist.github.com/SeverinAlexB/2b2acdf286407dbe5493fd7da641fdbf

I think point 1 to 4 are valid points of improvement (not all caused by you). Others are up to your judgement.

OpenAI

openapi.yaml needs updating

[SeverinAlexB]

A few remaining things, otherwise it is good to go

[SeverinAlexB]

Let's go