Description

This PR updates baseurl for some API endpoints.

Plex API updated its watchlist, scrobble and userState baseurl endpoints.
metadata subdomain is replaced by discover.

Example for watchlist fetching :
https://metadata.provider.plex.tv/library/sections/watchlist/
becomes
https://discover.provider.plex.tv/library/sections/watchlist/

New baseurl tested successfully.
Old baseurl returns 404 response for watchlist.
Plex webapp 4.148.0 uses the new baseurl for those 3 endpoints.

Overseer and Jellyseer already fixed it :

• fix(api): update Plex Watchlist URL sct/overseerr#4220
• fix(api): update Plex Watchlist URL seerr-team/seerr#1847

Fixes #1541

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the docstring for new or existing methods
• I have added tests when applicable