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/vendor/pear/ole/.php_cs.dist

@@ -0,0 +1,11 @@
+<?php
+
+return PhpCsFixer\Config::create()
+    ->setRules([
+        '@PSR1' => true,
+    ])
+    ->setFinder(
+        PhpCsFixer\Finder::create()
+        ->in(__DIR__)
+    )
+;