refactor: split music streaming into Hope Music

Move the media server, downloader, library volume, and browser player to the
standalone hope-media-music product. Keep Hope's music tools as a thin HTTP
client of the LAN service on port 8094.

Use a stable voice-room player scope instead of ephemeral LiveKit room names.
The agent now owns the conversation handshake: fresh reported playback mutes
its input, joining pauses music, and the last participant leaving resumes only
music it paused. Peer failures remain non-fatal.

Also move the voice deploy workflow onto the active Unraid Gitea runner and
remove yt-dlp/ffmpeg/media health and volume dependencies from the image.

docker-compose.yml

@@ -18,16 +18,14 @@ services:
       WEB_PORT: "${WEB_PORT:-9178}"
       VOICE_USERS_FILE: "/etc/hope/users.json"
       VOICE_DEFAULT_USER: "${VOICE_DEFAULT_USER:-shane}"
-      MEDIA_DIR: "/data/media"
-      MEDIA_SERVER_PORT: "${MEDIA_SERVER_PORT:-8093}"
-      YTDLP_COOKIES: "${YTDLP_COOKIES:-/data/media/cookies.txt}"
+      MUSIC_BASE_URL: "${MUSIC_BASE_URL:-http://192.168.86.2:8094}"
+      MUSIC_ROOM: "${MUSIC_ROOM:-voice-room}"
     volumes:
       - ./livekit.yaml:/etc/livekit.yaml:ro
       - ./certs:/etc/voice/certs
       - ./skills:/skills
-      - ./media:/data/media
     healthcheck:
-      test: ["CMD-SHELL", "curl -sfk https://localhost:$${WEB_PORT:-9178}/ -o /dev/null && curl -sf http://localhost:7880/ -o /dev/null && curl -sf http://localhost:$${MEDIA_SERVER_PORT:-8093}/media/api/healthz -o /dev/null"]
+      test: ["CMD-SHELL", "curl -sfk https://localhost:$${WEB_PORT:-9178}/ -o /dev/null && curl -sf http://localhost:7880/ -o /dev/null"]
       interval: 15s
       timeout: 5s
       retries: 3