Merge pull request #112 from FromDoppler/doi-2688-add-sent-date-display

[DOI-2688] Add sent date display

Author: emoralesms

Doppler.ReportingApi/Models/SentCampaignsMetrics.cs

@@ -20,9 +20,9 @@ public class SentCampaignMetrics
         public string Name { get; set; }
 
         /// <summary>
-        /// UTC date and time when the campaign was sent.
+        /// Date/time display in the campaign's sending timezone (e.g. "10/2/2026 16:43:48 PM (GMT-03:00)").
         /// </summary>
-        public DateTime UTCSentDate { get; set; }
+        public string SentDateDisplay { get; set; }
 
         /// <summary>
         /// Email address used as the sender of the campaign.