Tag requests from watchlist

[rfsbraz]

In an effort to manage the available space in my Plex server I delete inactive content from time time from Radarr and Sonarr, and the users request it again via Overseerr if they wish to.

I think the ability to set custom tags for when content was requested via the watchlist could help in prevent watchlisted items from being deleted, and give a way for my users to set which content they are actively watching and would like to keep available.