Get SSH connection info for a VPS/dedicated site.
Only available for VPS/dedicated plans (not shared hosting).
Requires: API key with read scope.
Args:
slug: Site identifier
Returns:
{"host": "184.107.x.x", "port": 22, "username": "admin",
"ssh_command": "ssh admin@184.107.x.x"}
Errors:
NOT_FOUND: Unknown slug
FORBIDDEN: Plan does not support SSH (shared plans)
ConnectorNo auth