feat: Add scheduled job to cleanup orphaned PR containers

Add CleanupOrphanedPreviewContainersJob that runs daily to find and remove any PR preview containers that weren't properly cleaned up when their PR was closed.

The job:
- Scans all functional servers for containers with coolify.pullRequestId label
- Checks if the corresponding ApplicationPreview record exists in the database
- Removes containers where the preview record no longer exists (truly orphaned)
- Acts as a safety net for webhook failures or race conditions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

app/Console/Kernel.php

@@ -6,6 +6,7 @@ use App\Jobs\CheckForUpdatesJob;
 use App\Jobs\CheckHelperImageJob;
 use App\Jobs\CheckTraefikVersionJob;
 use App\Jobs\CleanupInstanceStuffsJob;
+use App\Jobs\CleanupOrphanedPreviewContainersJob;
 use App\Jobs\PullChangelog;
 use App\Jobs\PullTemplatesFromCDN;
 use App\Jobs\RegenerateSslCertJob;
@@ -17,7 +18,6 @@ use App\Models\Server;
 use App\Models\Team;
 use Illuminate\Console\Scheduling\Schedule;
 use Illuminate\Foundation\Console\Kernel as ConsoleKernel;
-use Illuminate\Support\Facades\Log;
 
 class Kernel extends ConsoleKernel
 {
@@ -87,6 +87,9 @@ class Kernel extends ConsoleKernel
 
             $this->scheduleInstance->command('cleanup:database --yes')->daily();
             $this->scheduleInstance->command('uploads:clear')->everyTwoMinutes();
+
+            // Cleanup orphaned PR preview containers daily
+            $this->scheduleInstance->job(new CleanupOrphanedPreviewContainersJob)->daily()->onOneServer();
         }
     }