Include albumartist in filename; remove Claude API from LLM chain

Filename schema now: TT - AlbumArtist - TrackArtist - Title when albumartist
differs from track artist (e.g. pianist vs. composer). Identical artist → old
two-part format unchanged.

metadata_resolver: removed Claude API fallback entirely from _claude_resolve.
Chain is now Ollama (local, free) → OpenRouter (DeepSeek V3, cheap) only.

music_enricher: updated status line and use_claude flag accordingly.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

music_enricher.py

@@ -96,7 +96,7 @@ def process_album(
             hints,
             use_fingerprint=not args.no_fingerprint,
             use_api=not args.no_api,
-            use_claude=bool(os.getenv("ANTHROPIC_API_KEY")),
+            use_claude=not args.no_api,
         )
 
         # Cover art
@@ -235,8 +235,8 @@ def main() -> None:
         sys.exit(1)
 
     print(f"🎵 {len(album_dirs)} Album-Verzeichnisse gefunden.")
-    if os.getenv("ANTHROPIC_API_KEY"):
-        print("🤖 Claude API aktiv.")
+    if os.getenv("OLLAMA_HOST") or True:  # Ollama always attempted
+        print("🤖 LLM-Resolve: Ollama → OpenRouter (kein Claude)")
     if not args.no_api:
         print("🔍 MusicBrainz-Lookup aktiv.")
     if args.dry_run: