fix(storage): split S3 endpoint input and persist stopped status

Persist exited status across application, database, service, and preview stop paths, and reuse the split host/port/path input for S3 endpoints with linked validation feedback.

app/Actions/Database/StopDatabase.php

@@ -30,6 +30,7 @@ class StopDatabase
 
             // Reset restart tracking when database is manually stopped
             $database->update([
+                'status' => 'exited',
                 'restart_count' => 0,
                 'last_restart_at' => null,
                 'last_restart_type' => null,