Fix Spotify enrichment worker infinite loop on pre-matched artists

Artists with an existing spotify_artist_id but NULL spotify_match_status
were fetched by the priority queue every ~3 seconds. _process_artist
returned early (preserving the ID) without marking the status, so the
same artist was re-queued indefinitely — burning CPU and inflating API
call counters. Now marks the artist as 'matched' on the early-return
path.

core/spotify_worker.py

@@ -455,6 +455,7 @@ class SpotifyWorker:
         existing_id = self._get_existing_id('artist', artist_id)
         if existing_id:
             logger.debug(f"Preserving existing Spotify ID for artist '{artist_name}': {existing_id}")
+            self._mark_status('artist', artist_id, 'matched')
             return
 
         results = self.client.search_artists(artist_name, limit=5)

webui/static/helper.js

@@ -3609,6 +3609,7 @@ const WHATS_NEW = {
         { title: 'Fix Wishlist Dropping Cross-Album Tracks', desc: 'Wishlist cleanup was removing same-titled tracks from different albums even when Allow Duplicates was enabled. Cleanup now respects the setting — same song from different albums can coexist in the wishlist' },
         { title: 'Fix "Replace Lower Quality" Setting Not Persisting', desc: 'The import section appeared twice in the settings save payload — the second instance (with only staging_path) overwrote the first (with replace_lower_quality). Merged into a single block' },
         { title: 'Inbound Music Request API', desc: 'New POST /api/v1/request endpoint — trigger downloads from Discord bots, Home Assistant, curl, or any external tool. Async with status polling and optional notify_url callback. New "Webhook Received" automation trigger and "Search & Download" action in the Automation Hub' },
+        { title: 'Fix Spotify Enrichment Worker Infinite Loop', desc: 'Artists with an existing Spotify ID but no match status got stuck in the enrichment queue — the worker processed them every 3 seconds forever without marking them as done. Now correctly marks them as matched' },
 
         // --- April 14, 2026 ---
         { date: 'April 14, 2026' },