Returns behavioral feature state derived from an account's transaction history.

These signals expose the same data used by behavioral rule attributes (e.g. AMOUNT_Z_SCORE with scope: ACCOUNT, IS_NEW_COUNTRY with scope: ACCOUNT) and custom code TRANSACTION_HISTORY_SIGNALS features, allowing clients to inspect feature values before writing rules and debug rule behavior.

Note: 3DS fields are not available at the account scope and will be null.