接口 TrendAnalysis

interface TrendAnalysis {
    testId: string;
    direction: TrendDirection;
    slope: number;
    r2: number;
    dataPoints: TrendDataPoint[];
    changePoints: ChangePoint[];
    seasonalPattern: SeasonalPattern | null;
    codeChangeCorrelations: CodeChangeCorrelation[];
    forecast: TrendForecast;
    analyzedAt: number;
}