✅ LINQ help: IQueryable<Entity> -> Dictionary<string, Entity[]>

Dictionary<string, LogDatum[]> myDict = new() {
    {
        "serial 1",
        [
            <LogDatum with max Current at "2025-01-01 09">,
            <LogDatum with max Current at "2025-01-01 10">,
            <LogDatum with max Current at "2025-01-01 11">,
            <LogDatum with max Current at "2025-01-01 13">,
            <LogDatum with max Current at "2025-01-01 14">,
        ]
    },
};

public class LogDatum
{
    public long? Pk { get; set; }
    public string? SerialNumber { get; set; }
    public DateTime? Timestamp { get; set; }
    public double? Current { get; set; }
}

var res = await _nktContext.LogData
    .Where(data => data.Timestamp != null && data.Timestamp.Value >= dateStart && data.Timestamp.Value <= dateEnd)
    .GroupBy(data => new { data.SerialNumber, Hour = data.Timestamp!.Value.ToString("yyyy-MM-dd HH") })
    .ToDictionaryAsync(
        grouping => grouping.Key.SerialNumber ?? "N/A",
        grouping => grouping.ToArray()
    );