Function resolution_working_grid 

pub fn resolution_working_grid(
    energies: &[f64],
    instrument: Option<&InstrumentParams>,
    resonance_data: &[&ResonanceData],
) -> Result<WorkingGridLayout, TransmissionError>

Compute the working-grid layout for (energies, instrument, resonance_data).

Returns the auxiliary extended grid (boundary extension + resonance fine-structure) when a Gaussian resolution function is active, otherwise the data grid with identity indices. Fitting models use this to apply resolution on the same working grid forward_model uses and extract the data points last (issue #608).

resonance_data may be empty (e.g. the energy-scale model has no resonance data of its own); the auxiliary grid then carries boundary extension only, with no resonance fine-structure densification.

Errors

• TransmissionError::Resolution — if instrument is Some and energies is not sorted ascending.