Function prepare_commissioned_divisible_assets 

fn prepare_commissioned_divisible_assets(
    assets: &mut [AssetRef],
    remaining_capacities: &mut HashMap<AssetRef, AssetCapacity>,
)

Prepare divisible assets for appraisal.

Divisible assets are replaced in assets with an asset representing a single unit, as they are appraised one unit at a time. Their total capacity is stored in remaining_capacities.