Fix silent Docker crash: recursive chown, db error handling

- Entrypoint: chown -R /data (not just the directory) so existing
  volume files owned by root become writable by node user
- Entrypoint: add echo logging so startup progress is visible
- db.js: verify /data is writable before opening SQLite
- db.js: wrap Database() constructor in try-catch with clear error
  message instead of crashing silently at ESM import time

web/server/docker-entrypoint.sh

@@ -1,9 +1,13 @@
 #!/bin/sh
 set -e
 
+echo "[entrypoint] Starting up..."
+
 # Ensure data directory exists and is writable by the node user
 mkdir -p /data
-chown node:node /data
+chown -R node:node /data
+echo "[entrypoint] /data permissions fixed"
 
 # Drop privileges and exec the CMD
+echo "[entrypoint] Dropping to user 'node', running: $*"
 exec su-exec node "$@"