fix(backup): use shared compression for database dumps

Centralize compressor selection and apply helper-image compression to dump-all database backups.

tests/Feature/Jobs/DatabaseBackupJobTest.php

@@ -1,9 +1,12 @@
 <?php
 
 use App\Jobs\DatabaseBackupJob;
+use App\Models\InstanceSettings;
 use App\Models\S3Storage;
 use App\Models\ScheduledDatabaseBackup;
 use App\Models\ScheduledDatabaseBackupExecution;
+use App\Models\Server;
+use App\Models\ServerSetting;
 use App\Models\Team;
 use Illuminate\Foundation\Testing\RefreshDatabase;
 use Illuminate\Support\Facades\Schema;
@@ -322,3 +325,40 @@ test('database backup job escapes the S3 copy destination argument', function ()
         ->and($source)->toContain('mc cp {$escapedBackupLocation} {$escapedS3Destination}')
         ->and($source)->not->toContain('mc cp $this->backup_location temporary/$bucket{$this->backup_dir}/');
 });
+
+test('database dump compression uses the helper image and shared CPU setting', function (int $compressionCpuPercentage) {
+    InstanceSettings::unguarded(fn () => InstanceSettings::create(['id' => 0]));
+    $backup = new ScheduledDatabaseBackup(['timeout' => 3600]);
+    $job = new DatabaseBackupJob($backup);
+    $server = new Server;
+    $server->setRelation('settings', new ServerSetting([
+        'backup_compression_cpu_percentage' => $compressionCpuPercentage,
+    ]));
+    $job->server = $server;
+
+    $command = (new ReflectionClass($job))
+        ->getMethod('buildCompressedDumpCommand')
+        ->invoke($job, 'docker exec database pg_dumpall');
+
+    expect($command)
+        ->toStartWith('docker exec database pg_dumpall | docker run --rm -i')
+        ->toContain('coolify-helper')
+        ->toContain('command -v pigz')
+        ->toContain('pigz -3 -p')
+        ->toContain("\$(nproc) * {$compressionCpuPercentage} + 99")
+        ->toContain('gzip -3');
+})->with([
+    'low' => 25,
+    'high' => 75,
+]);
+
+test('all dump all database commands use shared helper compression', function () {
+    $source = file_get_contents(app_path('Jobs/DatabaseBackupJob.php'));
+
+    expect($source)
+        ->toContain('$this->buildCompressedDumpCommand($backupCommand)')
+        ->toContain('mysqldump -u root')
+        ->toContain('mariadb-dump -u root')
+        ->and(substr_count($source, '$this->buildCompressedDumpCommand($dumpCommand)'))->toBe(2)
+        ->and($source)->not->toContain('| gzip >');
+});