fix: Gitea Traefik routing and connection pool optimization

- Remove middleware reference from Gitea Traefik labels (caused routing issues)
- Optimize Gitea connection pool settings (MAX_IDLE_CONNS=30, authentication_timeout=180s)
- Add explicit service reference in Traefik labels
- Fix intermittent 504 timeouts by improving PostgreSQL connection handling

Fixes Gitea unreachability via git.michaelschiemer.de

src/Application/Admin/ValueObjects/AdminPageMetadata.php

@@ -0,0 +1,137 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Application\Admin\ValueObjects;
+
+use App\Framework\Icon\Icon;
+
+final readonly class AdminPageMetadata
+{
+    public function __construct(
+        public string $path,
+        public string $title,
+        public string $routeName,
+        public string $controllerClass,
+        public string $methodName,
+        public Icon|string|null $icon = null,
+        public ?string $section = null,
+        public int $order = 0,
+        public bool $hidden = false,
+        public ?string $description = null
+    ) {
+    }
+
+    /**
+     * Get icon as Icon object
+     */
+    public function getIcon(): ?Icon
+    {
+        if ($this->icon === null) {
+            return null;
+        }
+
+        if ($this->icon instanceof Icon) {
+            return $this->icon;
+        }
+
+        return Icon::fromString($this->icon);
+    }
+
+    public static function fromArray(array $data): self
+    {
+        return new self(
+            path: $data['path'],
+            title: $data['title'],
+            routeName: $data['route_name'] ?? '',
+            controllerClass: $data['controller_class'],
+            methodName: $data['method_name'],
+            icon: $data['icon'] ?? null, // Can be string or Icon
+            section: $data['section'] ?? null,
+            order: $data['order'] ?? 0,
+            hidden: $data['hidden'] ?? false,
+            description: $data['description'] ?? null
+        );
+    }
+
+    public function toArray(): array
+    {
+        return [
+            'path' => $this->path,
+            'title' => $this->title,
+            'route_name' => $this->routeName,
+            'controller_class' => $this->controllerClass,
+            'method_name' => $this->methodName,
+            'icon' => $this->icon instanceof Icon ? $this->icon->toString() : $this->icon,
+            'section' => $this->section,
+            'order' => $this->order,
+            'hidden' => $this->hidden,
+            'description' => $this->description,
+        ];
+    }
+
+    public function withTitle(string $title): self
+    {
+        return new self(
+            path: $this->path,
+            title: $title,
+            routeName: $this->routeName,
+            controllerClass: $this->controllerClass,
+            methodName: $this->methodName,
+            icon: $this->icon,
+            section: $this->section,
+            order: $this->order,
+            hidden: $this->hidden,
+            description: $this->description
+        );
+    }
+
+    public function withSection(?string $section): self
+    {
+        return new self(
+            path: $this->path,
+            title: $this->title,
+            routeName: $this->routeName,
+            controllerClass: $this->controllerClass,
+            methodName: $this->methodName,
+            icon: $this->icon,
+            section: $section,
+            order: $this->order,
+            hidden: $this->hidden,
+            description: $this->description
+        );
+    }
+
+    public function withOrder(int $order): self
+    {
+        return new self(
+            path: $this->path,
+            title: $this->title,
+            routeName: $this->routeName,
+            controllerClass: $this->controllerClass,
+            methodName: $this->methodName,
+            icon: $this->icon,
+            section: $this->section,
+            order: $order,
+            hidden: $this->hidden,
+            description: $this->description
+        );
+    }
+
+    public function withHidden(bool $hidden): self
+    {
+        return new self(
+            path: $this->path,
+            title: $this->title,
+            routeName: $this->routeName,
+            controllerClass: $this->controllerClass,
+            methodName: $this->methodName,
+            icon: $this->icon,
+            section: $this->section,
+            order: $this->order,
+            hidden: $hidden,
+            description: $this->description
+        );
+    }
+}
+