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/Core/ZB.MOM.WW.OtOpcUa.Configuration/Entities/PollGroup.cs

@@ -3,14 +3,19 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.Entities;
 /// <summary>Driver-scoped polling group. Tags reference it via <see cref="Tag.PollGroupId"/>.</summary>
 public sealed class PollGroup
 {
+    /// <summary>Gets or sets the database row identifier for the polling group.</summary>
     public Guid PollGroupRowId { get; set; }
 
+    /// <summary>Gets or sets the unique identifier for the polling group.</summary>
     public required string PollGroupId { get; set; }
 
+    /// <summary>Gets or sets the driver instance that owns this polling group.</summary>
     public required string DriverInstanceId { get; set; }
 
+    /// <summary>Gets or sets the display name of the polling group.</summary>
     public required string Name { get; set; }
 
+    /// <summary>Gets or sets the poll interval in milliseconds.</summary>
     public int IntervalMs { get; set; }
 
     /// <summary>Optimistic concurrency token for last-write-wins detection in the v2 live-edit model.</summary>