Optimize PushServerUpdateJob performance with batch updates and async jobs

- Eager load service applications and databases to eliminate N+1 queries
- Replace individual model updates with batch database updates for applications, previews, and services
- Move connectProxyToNetworks to async ConnectProxyToNetworksJob to avoid blocking status updates
- Optimize Server.databases() and applications() methods with efficient database queries
- Use flatMap for cleaner collection transformations

🤖 Generated with Claude Code

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

app/Models/StandaloneDocker.php

@@ -2,6 +2,7 @@
 
 namespace App\Models;
 
+use App\Jobs\ConnectProxyToNetworksJob;
 use App\Traits\HasSafeStringAttribute;
 
 class StandaloneDocker extends BaseModel
@@ -18,8 +19,7 @@ class StandaloneDocker extends BaseModel
             instant_remote_process([
                 "docker network inspect $newStandaloneDocker->network >/dev/null 2>&1 || docker network create --driver overlay --attachable $newStandaloneDocker->network >/dev/null",
             ], $server, false);
-            $connectProxyToDockerNetworks = connectProxyToNetworks($server);
-            instant_remote_process($connectProxyToDockerNetworks, $server, false);
+            ConnectProxyToNetworksJob::dispatchSync($server);
         });
     }