feat(server): add configurable SSH connection timeout per server

Add `connection_timeout` field to server settings, allowing per-server
override of the global SSH connection timeout constant.

- Migration adds `connection_timeout` integer column (default 10s)
- `ServerSetting` model exposes and casts the new field
- `SshMultiplexingHelper::getConnectionTimeout()` resolves per-server
  value with fallback to `constants.ssh.connection_timeout`
- All SSH/SCP command builders use the new resolver instead of the
  global config directly
- Livewire `Show` component binds `connectionTimeout` with validation
  (1–300 seconds) and syncs to/from the model
- UI input added to server settings form with helper text
- Feature tests cover default, persistence, resolver, and fallback

app/Livewire/Server/Show.php

@@ -32,6 +32,8 @@ class Show extends Component
 
     public string $port;
 
+    public int $connectionTimeout;
+
     public ?string $validationLogs = null;
 
     public ?string $wildcardDomain = null;
@@ -110,6 +112,7 @@ class Show extends Component
             'ip' => ['required', new ValidServerIp],
             'user' => ['required', 'regex:/^[a-zA-Z0-9_-]+$/'],
             'port' => 'required|integer|between:1,65535',
+            'connectionTimeout' => 'required|integer|min:1|max:300',
             'validationLogs' => 'nullable',
             'wildcardDomain' => 'nullable|url',
             'isReachable' => 'required',
@@ -138,6 +141,10 @@ class Show extends Component
                 'ip.required' => 'The IP Address field is required.',
                 'user.required' => 'The User field is required.',
                 'port.required' => 'The Port field is required.',
+                'connectionTimeout.required' => 'The SSH Connection Timeout field is required.',
+                'connectionTimeout.integer' => 'The SSH Connection Timeout must be an integer.',
+                'connectionTimeout.min' => 'The SSH Connection Timeout must be at least 1 second.',
+                'connectionTimeout.max' => 'The SSH Connection Timeout must not exceed 300 seconds.',
                 'wildcardDomain.url' => 'The Wildcard Domain must be a valid URL.',
                 'sentinelToken.required' => 'The Sentinel Token field is required.',
                 'sentinelMetricsRefreshRateSeconds.required' => 'The Metrics Refresh Rate field is required.',
@@ -210,6 +217,7 @@ class Show extends Component
             $this->server->validation_logs = $this->validationLogs;
             $this->server->save();
 
+            $this->server->settings->connection_timeout = $this->connectionTimeout;
             $this->server->settings->is_swarm_manager = $this->isSwarmManager;
             $this->server->settings->wildcard_domain = $this->wildcardDomain;
             $this->server->settings->is_swarm_worker = $this->isSwarmWorker;
@@ -237,6 +245,7 @@ class Show extends Component
             $this->ip = $this->server->ip;
             $this->user = $this->server->user;
             $this->port = $this->server->port;
+            $this->connectionTimeout = $this->server->settings->connection_timeout;
 
             $this->wildcardDomain = $this->server->settings->wildcard_domain;
             $this->isReachable = $this->server->settings->is_reachable;
@@ -407,7 +416,7 @@ class Show extends Component
                 return;
             }
 
-            $hetznerService = new \App\Services\HetznerService($this->server->cloudProviderToken->token);
+            $hetznerService = new HetznerService($this->server->cloudProviderToken->token);
             $serverData = $hetznerService->getServer($this->server->hetzner_server_id);
 
             $this->hetznerServerStatus = $serverData['status'] ?? null;
@@ -471,7 +480,7 @@ class Show extends Component
                 return;
             }
 
-            $hetznerService = new \App\Services\HetznerService($this->server->cloudProviderToken->token);
+            $hetznerService = new HetznerService($this->server->cloudProviderToken->token);
             $hetznerService->powerOnServer($this->server->hetzner_server_id);
 
             $this->hetznerServerStatus = 'starting';