docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

src/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware/Backend/HistorianEventDto.cs

@@ -8,11 +8,22 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
     /// </summary>
     public sealed class HistorianEventDto
     {
+        /// <summary>Gets or sets the unique identifier for the event.</summary>
         public Guid Id { get; set; }
+
+        /// <summary>Gets or sets the source of the event.</summary>
         public string? Source { get; set; }
+
+        /// <summary>Gets or sets the time when the event occurred.</summary>
         public DateTime EventTime { get; set; }
+
+        /// <summary>Gets or sets the time when the event was received.</summary>
         public DateTime ReceivedTime { get; set; }
+
+        /// <summary>Gets or sets the display text for the event.</summary>
         public string? DisplayText { get; set; }
+
+        /// <summary>Gets or sets the severity level of the event.</summary>
         public ushort Severity { get; set; }
     }
 }