feat: add ClickHouse backups and cloud ops tools

Enable scheduled ClickHouse backups across the job, API, and UI, and
guard unsupported database types via isBackupSolutionAvailable().
Convert Stripe subscription sync from a job to an action with clearer
discrepancy resolution, and add cloud:export-users plus
cloud:cleanup-unverified-users with tests.

app/Livewire/Project/Database/Backup/Index.php

@@ -22,13 +22,7 @@ class Index extends Component
         if (! $database) {
             return redirect()->route('dashboard');
         }
-        // No backups
-        if (
-            $database->getMorphClass() === \App\Models\StandaloneRedis::class ||
-            $database->getMorphClass() === \App\Models\StandaloneKeydb::class ||
-            $database->getMorphClass() === \App\Models\StandaloneDragonfly::class ||
-            $database->getMorphClass() === \App\Models\StandaloneClickhouse::class
-        ) {
+        if (! $database->isBackupSolutionAvailable()) {
             return redirect()->route('project.database.configuration', [
                 'project_uuid' => $project->uuid,
                 'environment_uuid' => $environment->uuid,