Random.org support

Provide a RANDOM_ORG_API_KEY secret to call the Random.org JSON-RPC API and receive true random integers sourced from atmospheric noise.

Automatic fallback

When the API key is missing the node now uses Python's pseudorandom number generator instead of failing, keeping test and demo workflows running without extra setup.

Flexible bounds

Configure min and max inputs with plain numbers or numeric strings. Both bounds are inclusive, and invalid ranges report clear errors so you can fix your inputs quickly.