pub fn validate_capital_execution_envelope(
authority_chain: &[CapitalExecutionAuthorityStep],
execution_window: &CapitalExecutionWindow,
rail: &CapitalExecutionRail,
issued_at: u64,
) -> Result<(), String>pub fn validate_capital_execution_envelope(
authority_chain: &[CapitalExecutionAuthorityStep],
execution_window: &CapitalExecutionWindow,
rail: &CapitalExecutionRail,
issued_at: u64,
) -> Result<(), String>