Function GET

Returns Promise<
    | NextResponse<
        {
            overview: {
                total: number;
                templates: number;
                specific: number;
                active: number;
                inactive: number;
                recent: number;
                assigned: number;
                availableTemplates: number;
            };
            byDepartment: { department: string
            | null; count: number }[];
            byLevel: { level: string | null; count: number }[];
            byJobNature: { jobNature: string | null; count: number }[];
        },
    >
    | NextResponse<{ error: string }>,
>