Function apply_tempo_access_key 

fn apply_tempo_access_key<N: Network>(
    tx: &mut N::TransactionRequest,
    config: Option<&TempoAccessKeyConfig>,
)
where
    N::TransactionRequest: FoundryTransactionBuilder<N>,

Applies Tempo access key fields (from, key_id) to a transaction request.

Note: key_authorization is intentionally not set here. It is only included if the key is not yet provisioned on-chain (checked in send_tempo_keychain).