fix(plugins): walk listenbrainz listens backwards with max_ts

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

plugins/lastfm/test/lastfm.test.ts

@@ -23,7 +23,7 @@ test("skips nowplaying, omits empty mbids, includes loved entries", async () =>
     if (q.get("method") === "user.getLovedTracks")
       return { lovedtracks: { track: [{ name: "Fav", mbid: "m9", artist: { name: "Art" } }], "@attr": { totalPages: "1" } } };
     return { recenttracks: { track: [
-      { name: "Now", artist: { "#text": "Art" }, "@attr": { nowplaying: "true" } },
+      { name: "Now", artist: { "#text": "Art" }, date: { uts: "1700000005" }, "@attr": { nowplaying: "true" } },
       rt("One", "1700000000", "rec1", { artist: { "#text": "Art", mbid: "a1" } }),
       rt("Two", "1699999999"),
     ], "@attr": { totalPages: "1" } } };