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/Validation/DraftSnapshot.cs

@@ -8,7 +8,9 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.Validation;
 /// </summary>
 public sealed class DraftSnapshot
 {
+    /// <summary>Gets the draft generation identifier.</summary>
     public required long GenerationId { get; init; }
+    /// <summary>Gets the cluster identifier.</summary>
     public required string ClusterId { get; init; }
 
     /// <summary>
@@ -23,13 +25,21 @@ public sealed class DraftSnapshot
     /// </summary>
     public string? Site { get; init; }
 
+    /// <summary>Gets the list of OPC UA namespaces.</summary>
     public IReadOnlyList<Namespace> Namespaces { get; init; } = [];
+    /// <summary>Gets the list of driver instances.</summary>
     public IReadOnlyList<DriverInstance> DriverInstances { get; init; } = [];
+    /// <summary>Gets the list of devices.</summary>
     public IReadOnlyList<Device> Devices { get; init; } = [];
+    /// <summary>Gets the list of UNS areas.</summary>
     public IReadOnlyList<UnsArea> UnsAreas { get; init; } = [];
+    /// <summary>Gets the list of UNS lines.</summary>
     public IReadOnlyList<UnsLine> UnsLines { get; init; } = [];
+    /// <summary>Gets the list of equipment.</summary>
     public IReadOnlyList<Equipment> Equipment { get; init; } = [];
+    /// <summary>Gets the list of tags.</summary>
     public IReadOnlyList<Tag> Tags { get; init; } = [];
+    /// <summary>Gets the list of poll groups.</summary>
     public IReadOnlyList<PollGroup> PollGroups { get; init; } = [];
 
     /// <summary>Prior Equipment rows (any generation, same cluster) for stability checks.</summary>