ND_AUTOIMPORTPLAYLISTS defaults to true and was importing every .m3u it
found scanning the music folder (one per album from ripping software) as
a playlist -- 2059 of them, 1605 completely empty, hundreds duplicated.
Cleaned up the existing junk via the Subsonic API; this stops it from
coming back on the next scan.
Navidrome indexes the existing music library on nas_media for Subsonic
access. SUB/WAVE (byo-proxy variant, LAN-only) provides the Icecast
broadcast, Liquidsoap crossfade/ducking, and AI DJ controller, reusing
the existing Ollama instance over npm-network for the LLM and Piper
for TTS.