{
  "type": "select",
  "key": "server_backup_retention_mode",
  "constant": "SERVER_BACKUP_RETENTION_MODE",
  "description": "Default backup retention when limit is reached (servers/VMs can override per entity). Hard limit blocks new backups. FIFO rolling removes the oldest eligible backup to make room.",
  "required": true,
  "placeholder": "hard_limit",
  "validation": "required|string|max:255",
  "options": [
    "hard_limit",
    "fifo_rolling"
  ],
  "category": "servers",
  "sensitive": false
}