feat: introduce WebSocket sync for XBoard nodes

- Implement Workerman-based `xboard:ws-server` for real-time node synchronization.
- Support custom routes, outbounds, and certificate configurations via JSON.
- Optimize scheduled tasks with `lazyById` to minimize memory footprint.
- Enhance reactivity using Observers for `Plan`, `Server`, and `ServerRoute`.
- Expand protocol support for `httpupgrade`, `h2`, and `mieru`.

app/Http/Requests/Admin/ConfigSave.php

@@ -51,6 +51,8 @@ class ConfigSave extends FormRequest
         'server_pull_interval' => 'integer',
         'server_push_interval' => 'integer',
         'device_limit_mode' => 'integer',
+        'server_ws_enable' => 'boolean',
+        'server_ws_url' => 'nullable|url',
         // frontend
         'frontend_theme' => '',
         'frontend_theme_sidebar' => 'nullable|in:dark,light',

app/Http/Requests/Admin/ServerSave.php

@@ -97,6 +97,9 @@ class ServerSave extends FormRequest
             'rate' => 'required|numeric',
             'rate_time_enable' => 'nullable|boolean',
             'rate_time_ranges' => 'nullable|array',
+            'custom_outbounds' => 'nullable|array',
+            'custom_routes' => 'nullable|array',
+            'cert_config' => 'nullable|array',
             'rate_time_ranges.*.start' => 'required_with:rate_time_ranges|string|date_format:H:i',
             'rate_time_ranges.*.end' => 'required_with:rate_time_ranges|string|date_format:H:i',
             'rate_time_ranges.*.rate' => 'required_with:rate_time_ranges|numeric|min:0',