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/Events/V5ClusterUpdated.php

@@ -0,0 +1,104 @@
+<?php
+
+namespace App\Events;
+
+use App\Models\V5\Cluster as V5Cluster;
+use App\Models\V5\Server as V5Server;
+use Illuminate\Broadcasting\InteractsWithSockets;
+use Illuminate\Broadcasting\PrivateChannel;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class V5ClusterUpdated implements ShouldBroadcastNow
+{
+    use Dispatchable, InteractsWithSockets, SerializesModels;
+
+    public function __construct(public int $teamId, public int $clusterId) {}
+
+    public function broadcastOn(): array
+    {
+        return [
+            new PrivateChannel("team.{$this->teamId}"),
+        ];
+    }
+
+    public function broadcastAs(): string
+    {
+        return 'v5.cluster.updated';
+    }
+
+    /**
+     * @return array{cluster: array<string, mixed>|null}
+     */
+    public function broadcastWith(): array
+    {
+        $cluster = V5Cluster::query()
+            ->where('team_id', $this->teamId)
+            ->with(['servers' => fn ($query) => $query
+                ->with('privateKey')
+                ->orderBy('name')])
+            ->withCount('servers')
+            ->find($this->clusterId);
+
+        return [
+            'cluster' => $cluster instanceof V5Cluster ? $this->serializeCluster($cluster) : null,
+        ];
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    private function serializeCluster(V5Cluster $cluster): array
+    {
+        return [
+            'id' => (string) $cluster->id,
+            'name' => $cluster->name,
+            'description' => $cluster->description,
+            'wireguardInterface' => $cluster->wireguard_interface,
+            'wireguardManagementPool' => $cluster->wireguard_management_pool,
+            'wireguardListenPort' => $cluster->wireguard_listen_port,
+            'containerNetworkPool' => $cluster->container_network_pool,
+            'containerNetworkPrefix' => $cluster->container_network_prefix,
+            'namespaces' => $cluster->namespaces ?? V5Cluster::DEFAULT_NAMESPACES,
+            'defaultDenyContainers' => $cluster->default_deny_containers,
+            'cooldVersion' => $cluster->coold_version,
+            'corrosionVersion' => $cluster->corrosion_version,
+            'corrosionGossipPort' => $cluster->corrosion_gossip_port,
+            'corrosionApiPort' => $cluster->corrosion_api_port,
+            'builderEnabled' => $cluster->builder_enabled,
+            'builderCapacity' => $cluster->builder_capacity,
+            'builderCpuQuota' => $cluster->builder_cpu_quota,
+            'builderMemoryMax' => $cluster->builder_memory_max,
+            'builderTimeoutSecs' => $cluster->builder_timeout_secs,
+            'lastCliAction' => $cluster->last_cli_action,
+            'lastCliStatus' => $cluster->last_cli_status,
+            'lastCliSummary' => $cluster->last_cli_summary,
+            'lastCliRanAt' => $cluster->last_cli_ran_at?->toJSON(),
+            'serversCount' => $cluster->servers_count ?? $cluster->servers->count(),
+            'servers' => $cluster->servers->map(fn (V5Server $server) => [
+                'id' => (string) $server->id,
+                'name' => $server->name,
+                'host' => $server->host,
+                'status' => $server->status,
+                'capabilities' => $server->capabilities ?? [],
+                'builderEnabled' => $server->builder_enabled,
+                'builderCapacity' => $server->builder_capacity,
+                'builderCpuQuota' => $server->builder_cpu_quota,
+                'uuid' => $server->uuid,
+                'nodeAddress' => $server->node_address,
+                'wireguardListenPortOverride' => $server->wireguard_listen_port_override,
+                'wireguardEndpointOverride' => $server->wireguard_endpoint_override,
+                'wireguardManagementIp' => $server->wireguard_management_ip,
+                'wireguardPublicKey' => $server->wireguard_public_key,
+                'containerSubnets' => $server->container_subnets ?? [],
+                'privateKeyName' => $server->privateKey?->name,
+                'lastBootstrappedAt' => $server->last_bootstrapped_at?->toJSON(),
+                'lastBootstrapAction' => $server->last_bootstrap_action,
+                'lastBootstrapStatus' => $server->last_bootstrap_status,
+                'lastBootstrapOutput' => $server->last_bootstrap_output,
+                'lastBootstrapRanAt' => $server->last_bootstrap_ran_at?->toJSON(),
+            ])->all(),
+        ];
+    }
+}