Method DenormalizeFromStorage(DateTimeOffset)
Denormalize DateTime from DB for returning to user.
Returns DateTime with Kind = Utc.
Example:
DB: 2025-11-16 00:00:00+00 → DateTime(2025, 11, 16, 0, 0, 0, DateTimeKind.Utc)
public static DateTime DenormalizeFromStorage(DateTimeOffset dateTimeOffset)