RSS Feeds now have pagination

[nylonee]

In the past, RSS feeds only showed the last 50 items requested

However, they now use pagination, for example at the root level:

    "links": {
        "self": "https://rss.plex.tv/LINK?cursor=123"
        "next": "https://rss.plex.tv/LINK?cursor=456"
    },

We can use this to fetch far more watchlist items (potentially all items?). This speeds up the watchlistarr initial sync, as RSS is the superior choice for fetching content and aggregating it.