Function compareNodeScorecards

Returns {
    deltas: {
        economicSignificanceIndex: number | null;
        integrityIndex: number;
        layers: { delta: number; layerName: string }[];
        overall: number;
        riskIndices: { delta: number; id: string }[];
        topQuestionGaps: { delta: number; questionId: string }[];
        topQuestionWins: { delta: number; questionId: string }[];
        valueScore: number | null;
    };
    nodeA: OrgNodeScorecard;
    nodeB: OrgNodeScorecard;
}