Set your BorealHost API key for this session.
Call this if you already have an API key (from a previous registration,
checkout completion, or the BorealHost panel). All subsequent tool calls
will use this key for authentication.
No need to call this after register() — the key is set automatically.
Args:
api_key: Your BorealHost API key (format: bh_<48 hex chars>)
Returns:
{"success": true, "message": "API key set for this session",
"key_prefix": "bh_..."}
Connector