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/V5Model.php

@@ -3,8 +3,21 @@
 namespace App\Models\V5;
 
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Support\Facades\Schema;
 
 abstract class V5Model extends Model
 {
-    //
+    protected static function boot(): void
+    {
+        parent::boot();
+
+        static::creating(function (Model $model): void {
+            if (
+                Schema::hasColumn($model->getTable(), 'uuid')
+                && ! $model->getAttribute('uuid')
+            ) {
+                $model->setAttribute('uuid', new_public_id());
+            }
+        });
+    }
 }