feat: add route to fetch user by jellyfin id

[fredrikburmester]

Description

Fetch a seerr user by Jellyfin ID. Currently this is not possible and from my understanding makes it difficult for clients to find a user without fetching all users and matching the ID.

To-Dos

• Disclosed any use of AI (see our policy)
• Successful build pnpm build
• Translation keys pnpm i18n:extract

[0xSysR3ll]

You will also need to update the API's documentation to make this work.

[fredrikburmester]

Thank you I'll do that.

[fredrikburmester]

Added ✅ @0xSysR3ll

One question though. The user/{userId} endpoint says: "[...] Requires the MANAGE_USERS permission.". This seems inaccurate since it only filters the JSON based on permissions, not block the endpoint completely (401/403). Now, I use the same permissions as that endpoint, but i think it's more accurate to write "[...] Returns filtered data based on the caller's permissions."

Am I misunderstanding how permissions are handled, or is it fine as I've written it?

[gauthier-th]

Am I misunderstanding how permissions are handled, or is it fine as I've written it?

It's fine like you wrote it, the description from the user/{userId} endpoint is not accurate, it is indeed filtered based on the user permission.

[fallenbagel]

Please run prettier on this file and fix the formatting issue