fix(entrypoint): wait for DB file before bind mounting

entrypoint.sh

@@ -99,8 +99,21 @@ start_app() {
   # Ensure shared directories exist
   mkdir -p /shared_data/plugins /shared_data/cache /shared_data/backup /shared_data/artist_images
 
+  # Wait for LiteFS to expose the DB file in the FUSE mount
+  echo "Waiting for /data/navidrome.db..."
+  local db_timeout=30
+  local db_count=0
+  while [ ! -f /data/navidrome.db ] && [ $db_count -lt $db_timeout ]; do
+    sleep 1
+    db_count=$((db_count + 1))
+  done
+
+  if [ ! -f /data/navidrome.db ]; then
+    echo "ERROR: /data/navidrome.db did not appear after ${db_timeout}s"
+    return 1
+  fi
+
   # Bind mount the DB so Navidrome finds it in its DataFolder
-  # We use bind mount because /shared_data is likely SMB and doesn't support symlinks
   touch /shared_data/navidrome.db
   mount --bind /data/navidrome.db /shared_data/navidrome.db