Function calculate_pid_parameters 

pub fn calculate_pid_parameters(
    result: TuningResult,
    template: &DcsTemplate,
) -> PidParameters

Converts a TuningResult into the PID parameters a specific DCS/PLC template expects. Pure port of CalculatePIDparameters.

Order matters and matches the legacy app exactly: the integral/derivative unit conversion (minutes -> seconds) happens before the reset-rate/reset-gain/derivative-gain type conversion, so e.g. Ki ends up computed from Ti already expressed in seconds whenever the template’s integral_unit is TimeUnit::Seconds — not from Ti in minutes.