feat: add videodb media index with Docker stack

- Add videodb PHP/MySQL media collection manager (Blu-ray, DVD, CD)
- Dockerfile: PHP 8.1 + Apache with GD/mysqli/exif extensions
- docker-compose.yml: app on port 6761 + MySQL 8.0 with health checks
- docker-entrypoint.sh: auto-generates config.inc.php from env vars,
  waits for MySQL, initializes DB schema idempotently
- init-db.php: CLI schema installer using app's own prefix_query() logic
- Persistent volumes for DB, cache, and cover images

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

videodb/javascript/edit.js

@@ -0,0 +1,33 @@
+/**
+ * Lookup logic
+ *
+ * @package JavaScript
+ * @author  Andreas Goetz	<cpuidle@gmx.de>
+ * @version $Id: edit.js,v 1.6 2009/04/06 06:50:54 andig2 Exp $
+ */
+
+function lookupData(title)
+{
+	var win	= open('lookup.php?find=' + encodeURIComponent(title), 'lookup',
+		       'width=550,height=500,menubar=no,resizable=yes,scrollbars=yes,status=yes,toolbar=no');
+	win.focus();
+}
+
+function lookupImage(title)
+{
+	var win	= open('lookup.php?find=' + encodeURIComponent(title) + '&searchtype=image&engine=google', 'lookup',
+		       'width=450,height=500,menubar=no,resizable=yes,scrollbars=yes,status=yes,toolbar=no');
+	win.focus();
+}
+
+function changedId()
+{
+	if (document.edi.imdbID.value)
+	{
+		if (document.edi.lookup0.checked) document.edi.lookup1.checked = true;
+	}
+	else
+	{
+		document.edi.lookup0.checked = true;
+	}
+}