fix(lavalink): drop spotify-tokener, lavasrc uses client credentials

- spotify URL resolution was broken (500 NPE): preferPartnerApi +
  customTokenEndpoint depended on dead spotify-tokener (-32000)
- remove tokener service from compose, remove dead SPOTIFY_* env from
  bot container (bot code never used them)
- spotify metadata now resolves via standard client credentials,
  playback is mirrored to SoundCloud via scsearch providers (ISRC/QUERY)

docker-compose.yml

@@ -3,8 +3,6 @@ services:
     image: ghcr.io/lavalink-devs/lavalink:4-alpine
     container_name: loki-lavalink
     restart: unless-stopped
-    depends_on:
-      - spotify-tokener
     ports:
       - "127.0.0.1:2333:2333"
     volumes:
@@ -22,16 +20,6 @@ services:
       retries: 3
       start_period: 20s
 
-  spotify-tokener:
-    image: ghcr.io/topi314/spotify-tokener:master
-    container_name: spotify-tokener
-    restart: unless-stopped
-    environment:
-      - SPOTIFY_TOKENER_ADDR=0.0.0.0:8086
-      - SPOTIFY_TOKENER_LOG_LEVEL=INFO
-    networks:
-      - default
-
   bot:
     build: .
     container_name: loki-bot
@@ -54,8 +42,6 @@ services:
       LAVALINK_HOST: lavalink
       LAVALINK_PORT: "2333"
       LAVALINK_PASSWORD: Hch4HiVCxkKs9JPiSnrt4Q
-      SPOTIFY_CLIENT_ID: ${SPOTIFY_CLIENT_ID}
-      SPOTIFY_CLIENT_SECRET: ${SPOTIFY_CLIENT_SECRET}
       R34_API_KEY: ${R34_API_KEY}
       R34_USER_ID: ${R34_USER_ID}
       DEEPSEEK_API_KEY: ${DEEPSEEK_API_KEY}