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/ClusterNode.cs

@@ -6,13 +6,16 @@ public sealed class ClusterNode
     /// <summary>Stable per-machine logical ID, e.g. "LINE3-OPCUA-A".</summary>
     public required string NodeId { get; set; }
 
+    /// <summary>The unique identifier of the cluster this node belongs to.</summary>
     public required string ClusterId { get; set; }
 
     /// <summary>Machine hostname / IP.</summary>
     public required string Host { get; set; }
 
+    /// <summary>The OPC UA server port (default 4840).</summary>
     public int OpcUaPort { get; set; } = 4840;
 
+    /// <summary>The dashboard HTTP port (default 8081).</summary>
     public int DashboardPort { get; set; } = 8081;
 
     /// <summary>
@@ -32,15 +35,21 @@ public sealed class ClusterNode
     /// </summary>
     public string? DriverConfigOverridesJson { get; set; }
 
+    /// <summary>Gets or sets a value indicating whether this node is enabled.</summary>
     public bool Enabled { get; set; } = true;
 
+    /// <summary>Gets or sets the timestamp when this node was last seen.</summary>
     public DateTime? LastSeenAt { get; set; }
 
+    /// <summary>Gets or sets the timestamp when this node was created.</summary>
     public DateTime CreatedAt { get; set; } = DateTime.UtcNow;
 
+    /// <summary>Gets or sets the username of who created this node.</summary>
     public required string CreatedBy { get; set; }
 
     // Navigation
+    /// <summary>Gets or sets the cluster this node belongs to.</summary>
     public ServerCluster? Cluster { get; set; }
+    /// <summary>Gets or sets the credentials associated with this node.</summary>
     public ICollection<ClusterNodeCredential> Credentials { get; set; } = [];
 }