feat: roll openapi json into fastapi

[pawel-kmiecik]

This PR:

• bumps pydantic to 2.5.x and removes it from explicit dependencies list (will be managed by fastapi)
• introduced Form params description in the code, which will form openapi and swagger documentation
• rolled back some openapi customizations
• keeps backward compatibility for passing parameters in form of list[str] (will not be shown in the documentation)

[pawel-kmiecik]

@awalker4 should I remove openapi.json file from the repository then?

[awalker4]

I'm getting this error locally - any idea what happened?

[awalker4]

@awalker4 should I remove openapi.json file from the repository then?

Yes please!

[pawel-kmiecik]

I'm getting this error locally - any idea what happened?

Should be fixed now, I removed openapi.json static file as well.