feat(v5): add server bootstrap job with realtime cluster broadcasting

- Add V5BootstrapServerJob: SSH into new servers, install coold/WireGuard,
  track bootstrap progress via last_bootstrap_action/status/output fields
- Add V5ClusterUpdated event: broadcasts full cluster+servers payload to
  team private channel on bootstrap state changes
- Add V5RealtimeTestEvent + RealtimeTest page for WebSocket connectivity testing
- Consolidate 3 dropped migrations into base cluster/server migrations:
  WireGuard config, builder CPU quota, status check fields, uuid
- Auto-generate uuid on V5Model create via Schema::hasColumn guard
- Expose currentTeam.id in Inertia shared props
- Add showCluster, realtimeTest, broadcastRealtimeTest controller endpoints
- Add dropdown-menu UI component

app/Models/V5/Server.php

@@ -12,6 +12,7 @@ class Server extends V5Model
     protected $table = 'v5_servers';
 
     protected $fillable = [
+        'uuid',
         'team_id',
         'cluster_id',
         'created_by_user_id',
@@ -32,6 +33,10 @@ class Server extends V5Model
         'wireguard_public_key',
         'container_subnets',
         'last_bootstrapped_at',
+        'last_bootstrap_action',
+        'last_bootstrap_status',
+        'last_bootstrap_output',
+        'last_bootstrap_ran_at',
         'last_status_check',
         'last_status_output',
         'last_status_checked_at',
@@ -44,6 +49,7 @@ class Server extends V5Model
             'builder_enabled' => 'boolean',
             'container_subnets' => 'array',
             'last_bootstrapped_at' => 'datetime',
+            'last_bootstrap_ran_at' => 'datetime',
             'last_status_checked_at' => 'datetime',
         ];
     }