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/HistorianSample.cs

@@ -11,11 +11,13 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
     /// </summary>
     public sealed class HistorianSample
     {
+        /// <summary>Gets or sets the historical data value.</summary>
         public object? Value { get; set; }
 
-        /// <summary>Raw OPC DA quality byte from the historian SDK (low 8 bits of OpcQuality).</summary>
+        /// <summary>Gets or sets the raw OPC DA quality byte from the historian SDK (low 8 bits of OpcQuality).</summary>
         public byte Quality { get; set; }
 
+        /// <summary>Gets or sets the UTC timestamp of the historical sample.</summary>
         public DateTime TimestampUtc { get; set; }
     }
 
@@ -25,7 +27,9 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Historian.Wonderware.Backend
     /// </summary>
     public sealed class HistorianAggregateSample
     {
+        /// <summary>Gets or sets the aggregate value, or null if unavailable.</summary>
         public double? Value { get; set; }
+        /// <summary>Gets or sets the UTC timestamp of the aggregate sample.</summary>
         public DateTime TimestampUtc { get; set; }
     }
 }