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/guzzlehttp/guzzle/composer.json

@@ -0,0 +1,92 @@
+{
+    "name": "guzzlehttp/guzzle",
+    "type": "library",
+    "description": "Guzzle is a PHP HTTP client library",
+    "keywords": [
+        "framework",
+        "http",
+        "rest",
+        "web service",
+        "curl",
+        "client",
+        "HTTP client"
+    ],
+    "homepage": "http://guzzlephp.org/",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Graham Campbell",
+            "email": "hello@gjcampbell.co.uk",
+            "homepage": "https://github.com/GrahamCampbell"
+        },
+        {
+            "name": "Michael Dowling",
+            "email": "mtdowling@gmail.com",
+            "homepage": "https://github.com/mtdowling"
+        },
+        {
+            "name": "Jeremy Lindblom",
+            "email": "jeremeamia@gmail.com",
+            "homepage": "https://github.com/jeremeamia"
+        },
+        {
+            "name": "George Mponos",
+            "email": "gmponos@gmail.com",
+            "homepage": "https://github.com/gmponos"
+        },
+        {
+            "name": "Tobias Nyholm",
+            "email": "tobias.nyholm@gmail.com",
+            "homepage": "https://github.com/Nyholm"
+        },
+        {
+            "name": "Márk Sági-Kazár",
+            "email": "mark.sagikazar@gmail.com",
+            "homepage": "https://github.com/sagikazarmark"
+        },
+        {
+            "name": "Tobias Schultze",
+            "email": "webmaster@tubo-world.de",
+            "homepage": "https://github.com/Tobion"
+        }
+    ],
+    "require": {
+        "php": ">=5.5",
+        "ext-json": "*",
+        "symfony/polyfill-intl-idn": "^1.17",
+        "guzzlehttp/promises": "^1.0",
+        "guzzlehttp/psr7": "^1.9"
+    },
+    "require-dev": {
+        "ext-curl": "*",
+        "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.4 || ^7.0",
+        "psr/log": "^1.1"
+    },
+    "suggest": {
+        "psr/log": "Required for using the Log middleware"
+    },
+    "config": {
+        "sort-packages": true,
+        "allow-plugins": {
+            "bamarni/composer-bin-plugin": true
+        }
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-master": "6.5-dev"
+        }
+    },
+    "autoload": {
+        "psr-4": {
+            "GuzzleHttp\\": "src/"
+        },
+        "files": [
+            "src/functions_include.php"
+        ]
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "GuzzleHttp\\Tests\\": "tests/"
+        }
+    }
+}