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/DigitalOceanService.php

@@ -28,7 +28,7 @@ class DigitalOceanService
                 }
 
                 return $attempt * 100;
-            })
+            }, throw: false)
             ->{$method}($this->baseUrl.$endpoint, $data);
 
         if (! $response->successful()) {