fix: harden Vultr create, Gmail identity, and provider retries

Wrap Vultr server creation in DB transactions and delete the remote
instance when local persistence fails (API and Livewire). Scope
plus/dot email normalization to gmail.com/googlemail.com only.
Use throw:false on DigitalOcean/Vultr HTTP retries, and normalize
service log line counts via normalizeLogLines.

app/Services/VultrService.php

@@ -17,7 +17,7 @@ class VultrService
             'Authorization' => 'Bearer '.$this->token,
         ])
             ->timeout(30)
-            ->retry(3, fn (int $attempt) => $attempt * 100)
+            ->retry(3, fn (int $attempt) => $attempt * 100, throw: false)
             ->{$method}($this->baseUrl.$endpoint, $data);
 
         if (! $response->successful()) {