feat: remove Navidrome, use Jellyfin for all media

- Remove Navidrome service from media stack
- Remove Navidrome configuration from arty.yml
- Remove media/scan command (Navidrome-specific)
- Jellyfin now handles all media: images, videos, and music

arty.yml

@@ -155,8 +155,6 @@ envs:
     MEDIA_FILESTASH_IMAGE: machines/filestash:latest
     MEDIA_FILESTASH_TRAEFIK_HOST: filestash.media.pivoine.art
     MEDIA_FILESTASH_CANARY: true
-    MEDIA_NAVIDROME_IMAGE: deluan/navidrome:latest
-    MEDIA_NAVIDROME_TRAEFIK_HOST: navidrome.media.pivoine.art
     # PairDrop
     DROP_TRAEFIK_ENABLED: true
     DROP_COMPOSE_PROJECT_NAME: drop
@@ -318,4 +316,3 @@ scripts:
   net/create: docker network create "$NETWORK_NAME"
   awsm/import: |
     docker cp "/tmp/awesome-database" "awesome_app:/home/node/.awesome"
-  media/scan: docker compose restart navidrome