fix(monitor): only auto-monitor core studio releases

autoMonitorFuture flagged any new release, so it could auto-monitor a
newly-released live album or compilation. Gate it on is_core_release so
auto-monitoring matches the studio-only default the UI shows.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

worker/lyra_worker/monitor.py

@@ -4,6 +4,7 @@ from datetime import date, datetime
 import psycopg
 
 from lyra_worker.browser import MbBrowser
+from lyra_worker.release_filter import is_core_release
 
 _TRUE = {"1", "true", "yes", "on"}
 
@@ -58,7 +59,11 @@ def discover(conn: psycopg.Connection, browser: MbBrowser, cfg: MonitorConfig) -
     inserted = 0
     for artist_id, mbid, name, auto_future, monitor_from in artists:
         for rg in browser.browse_release_groups(mbid):
-            monitored = bool(auto_future) and _is_new(rg.first_release_date, monitor_from)
+            monitored = (
+                bool(auto_future)
+                and _is_new(rg.first_release_date, monitor_from)
+                and is_core_release(rg.primary_type, rg.secondary_types)
+            )
             with conn.cursor() as cur:
                 cur.execute(
                     'INSERT INTO "MonitoredRelease" (id, "watchedArtistId", "artistMbid", '