Add P2P tables, config flags and db helpers

docker-compose.yml

@@ -18,6 +18,15 @@ services:
       # Shared secret the lyrics-worker uses to list songs and upload lyrics.
       # Set in Dokploy's Environment tab (same value feeds both services).
       LYRICS_WORKER_TOKEN: "${LYRICS_WORKER_TOKEN:-}"
+      # Peer-to-peer sharing (docs/p2p-architecture.md). ON by default.
+      P2P_ENABLED: "${P2P_ENABLED:-1}"
+      # Malware scan before a file's hash is admitted. OFF by default; needs an
+      # image built with INSTALL_CLAMAV=1. Hashing + media validation always run.
+      P2P_MALWARE_SCAN: "${P2P_MALWARE_SCAN:-0}"
+      # P2P_STALE_DAYS: "7"          # holder shown as stale after this many days unchecked
+      # P2P_KEEP_MIN_VIEWS: "3"      # server keeps copies with ≥ this many views…
+      # P2P_KEEP_DAYS: "30"          # …in this many days
+      # P2P_KEEP_RECENT_DAYS: "14"   # …or played this recently
       # Optional: force yt-dlp search instead of InnerTube API
       # SEARCH_INNERTUBE: "0"   # force yt-dlp search
       # Optional: override yt-dlp binary path if you mount a custom one