CoreDescriptors: StorageDescriptor<
    [Key: number],
    {
        current_work?: {
            assignments: [
                BrokerCoretimeInterfaceCoreAssignment,
                { ratio: number; remaining: number },
            ][];
            end_hint?: number;
            pos: number;
            step: number;
        };
        queue?: { first: number; last: number };
    },
    false,
    "0",
>

Assignments which are currently active.

They will be picked from PendingAssignments once we reach the scheduled block number in PendingAssignments.